Hi Alex, thanks for looking into this!
Here is the gif and the idea.log.

2020-03-27 16:24:47,795 [ 0] INFO - #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------
2020-03-27 16:24:47,839 [ 44] INFO - #com.intellij.idea.Main - IDE: CUBA Studio (build #CS-192.7142.131, 13 Mar 2020 18:45)
2020-03-27 16:24:47,843 [ 48] INFO - #com.intellij.idea.Main - OS: Windows 10 (10.0, amd64)
2020-03-27 16:24:47,843 [ 48] INFO - #com.intellij.idea.Main - JRE: 11.0.4+10-b304.77 (JetBrains s.r.o)
2020-03-27 16:24:47,843 [ 48] INFO - #com.intellij.idea.Main - JVM: 11.0.4+10-b304.77 (OpenJDK 64-Bit Server VM)
2020-03-27 16:24:47,844 [ 49] INFO - #com.intellij.idea.Main - JVM Args: exit -Xms128m -Xmx750m -XX:ReservedCodeCacheSize=240m -XX:+UseConcMarkSweepGC -XX:SoftRefLRUPolicyMSPerMB=50 -ea -XX:CICompilerCount=2 -Dsun.io.useCanonPrefixCache=false -Djava.net.preferIPv4Stack=true -Djdk.http.auth.tunneling.disabledSchemes="" -XX:+HeapDumpOnOutOfMemoryError -XX:-OmitStackTraceInFastThrow -Djdk.attach.allowAttachSelf -Dkotlinx.coroutines.debug=off -Djdk.module.illegalAccess.silent=true -Djb.vmOptionsFile=C:\Program Files\Haulmont\CUBA Studio 2019.2\bin\cuba-studio64.exe.vmoptions -Djava.library.path=C:\Program Files\Haulmont\CUBA Studio 2019.2\jbr\\bin;C:\Program Files\Haulmont\CUBA Studio 2019.2\jbr\\bin\server -Didea.platform.prefix=Idea -Didea.jre.check=true -Dide.native.launcher=true -Didea.paths.selector=CubaStudio2019.2 -XX:ErrorFile=C:\Users\matth\java_error_in_studio_%p.log -XX:HeapDumpPath=C:\Users\matth\java_error_in_studio.hprof
2020-03-27 16:24:47,845 [ 50] INFO - #com.intellij.idea.Main - charsets: JNU=MS932 file=MS932
2020-03-27 16:24:47,919 [ 124] INFO - #com.intellij.idea.Main - JNA library (64-bit) loaded in 88 ms
2020-03-27 16:24:47,928 [ 133] INFO - penapi.util.io.win32.IdeaWin32 - Native filesystem for Windows is operational
2020-03-27 16:24:48,025 [ 230] INFO - tellij.diagnostic.LoadingPhase - Reached SPLASH loading phase
2020-03-27 16:24:48,064 [ 269] INFO - plication.impl.ApplicationImpl - CPU cores: 8; ForkJoinPool.commonPool: java.util.concurrent.ForkJoinPool@378a7e76[Running, parallelism = 7, size = 0, active = 0, running = 0, steals = 0, tasks = 0, submissions = 0]; factory: com.intellij.concurrency.IdeaForkJoinWorkerThreadFactory@24e20048
2020-03-27 16:24:48,584 [ 789] INFO - llij.ide.plugins.PluginManager - Cannot find optional descriptor duplicates-groovy.xml
2020-03-27 16:24:48,585 [ 790] INFO - llij.ide.plugins.PluginManager - Cannot find optional descriptor duplicates-detection-groovy.xml
2020-03-27 16:24:50,246 [ 2451] INFO - llij.ide.plugins.PluginManager - Cannot find optional descriptor profiler-java.xml
2020-03-27 16:24:50,395 [ 2600] INFO - llij.ide.plugins.PluginManager - Loaded bundled plugins: Bytecode Viewer (192.7142.131), ChangeReminder (192.7142.131), Configuration Script (192.7142.131), Copyright (192.7142.131), Coverage (192.7142.131), Eclipse Interoperability (192.7142.131), EditorConfig (192.7142.131), Git (192.7142.131), Gradle (192.7142.131), Gradle-Maven (192.7142.131), Groovy (192.7142.131), IDEA CORE (192.7142.131), IntelliLang (192.7142.131), JUnit (192.7142.131), Java (192.7142.131), Java Bytecode Decompiler (192.7142.131), Java IDE Customization (192.7142.131), Java Internationalization (192.7142.131), Java Stream Debugger (192.7142.131), JavaFX (192.7142.131), Kotlin (1.3.41-release-IJ2019.2-1), Machine Learning Code Completion (192.7142.131), Markdown (192.7142.131), Maven (192.7142.131), Properties (192.7142.131), Settings Repository (192.7142.131), Shell Script (192.7142.131), Task Management (192.7142.131), Terminal (192.7142.131), TestNG (192.7142.131), TextMate bundles (192.7142.131), XPathView + XSLT (192.7142.131), XSLT Debugger (192.7142.131), YAML (192.7142.131)
2020-03-27 16:24:50,395 [ 2600] INFO - llij.ide.plugins.PluginManager - Loaded custom plugins: CUBA (13.1-191), IDE Features Trainer (192.5728.5)
2020-03-27 16:24:50,395 [ 2600] INFO - llij.ide.plugins.PluginManager - Disabled plugins: GitHub (192.7142.131), Mercurial (192.7142.131), Subversion (192.7142.131)
2020-03-27 16:25:01,839 [ 14044] INFO - tellij.diagnostic.LoadingPhase - Reached CONFIGURATION_STORE_INITIALIZED loading phase
2020-03-27 16:25:01,977 [ 14182] INFO - ellij.util.io.PagedFileStorage - lower=100; upper=500; buffer=10; max=705
2020-03-27 16:25:02,137 [ 14342] INFO - pl.local.NativeFileWatcherImpl - Starting file watcher: C:\Program Files\Haulmont\CUBA Studio 2019.2\bin\fsnotifier64.exe
2020-03-27 16:25:02,228 [ 14433] INFO - pl.local.NativeFileWatcherImpl - Native file watcher is operational.
2020-03-27 16:25:05,584 [ 17789] INFO - til.net.ssl.CertificateManager - Default SSL context initialized
2020-03-27 16:25:05,638 [ 17843] INFO - rains.ide.BuiltInServerManager - built-in server started, port 63342
2020-03-27 16:25:06,064 [ 18269] INFO - il.indexing.FileBasedIndexImpl - File index extensions iterated:227
2020-03-27 16:25:06,433 [ 18638] INFO - j.ide.ui.OptionsTopHitProvider - 34 ms spent to cache options in application
2020-03-27 16:25:06,582 [ 18787] INFO - tellij.diagnostic.LoadingPhase - Reached FRAME_SHOWN loading phase
2020-03-27 16:25:07,752 [ 19957] INFO - pl$FileIndexDataInitialization - Initialization done:1914
2020-03-27 16:25:08,070 [ 20275] INFO - exImpl$StubIndexInitialization - Initialization done:317
2020-03-27 16:25:08,584 [ 20789] INFO - pl.projectlevelman.NewMappings - VCS Root: [Git] - [<Project>]
2020-03-27 16:25:09,020 [ 21225] INFO - com.intellij.ide.ui.UISettings - Loaded: fontSize=13, fontScale=1.0; restored: fontSize=13, fontScale=1.0
2020-03-27 16:25:10,539 [ 22744] INFO - j.ide.script.IdeStartupScripts - 0 startup script(s) found
2020-03-27 16:25:10,673 [ 22878] INFO - rojectCodeStyleSettingsManager - Initialized from default code style settings.
2020-03-27 16:25:11,386 [ 23591] INFO - ing.migration.MigrationManager - Adding lesson states from previous version (0.7.49) of trainingPlugin / IDE Features Trainer from xml file: trainingPlugin
2020-03-27 16:25:15,990 [ 28195] INFO - .diagnostic.PerformanceWatcher - Pushing properties took 3918ms; general responsiveness: ok; EDT responsiveness: 0/2 sluggish, 1/2 very slow
2020-03-27 16:25:17,761 [ 29966] WARN - com.intellij.util.xmlb.Binding - no accessors for class org.jetbrains.kotlin.idea.highlighter.KotlinDefaultHighlightingSettingsProvider
2020-03-27 16:25:17,961 [ 30166] INFO - j.ide.ui.OptionsTopHitProvider - 1289 ms spent to cache options in project
2020-03-27 16:25:19,558 [ 31763] INFO - ge.ExternalProjectsDataStorage - Load external projects data in 1994 millis (read time: 1969)
2020-03-27 16:25:19,934 [ 32139] INFO - indexing.UnindexedFilesUpdater - Unindexed files update canceled
2020-03-27 16:25:19,953 [ 32158] INFO - pl.ProjectRootManagerComponent - project roots have changed
2020-03-27 16:25:20,015 [ 32220] INFO - .diagnostic.PerformanceWatcher - Pushing properties took 10ms; general responsiveness: ok; EDT responsiveness: ok
2020-03-27 16:25:21,948 [ 34153] INFO - .diagnostic.PerformanceWatcher - Post-startup activities under progress took 10055ms; general responsiveness: ok; EDT responsiveness: 2/10 sluggish, 3/10 very slow
2020-03-27 16:25:22,257 [ 34462] INFO - tartup.impl.StartupManagerImpl - C:/Users/matth/StudioProjects/kyuka/.idea case-sensitivity: expected=false actual=false
2020-03-27 16:25:22,331 [ 34536] INFO - #git4idea.commands.GitHandler - [.] git version
2020-03-27 16:25:22,378 [ 34583] INFO - tellij.diagnostic.LoadingPhase - Reached PROJECT_OPENED loading phase
2020-03-27 16:25:22,434 [ 34639] INFO - pl.projectlevelman.NewMappings - Mapped Roots: 1
2020-03-27 16:25:22,586 [ 34791] INFO - #git4idea.commands.GitHandler - git version 2.16.2.windows.1
2020-03-27 16:25:22,622 [ 34827] INFO - ea.config.GitExecutableManager - Git version for C:\Program Files\Git\cmd\git.exe : 2.16.2
2020-03-27 16:25:22,756 [ 34961] INFO - tor.impl.FileEditorManagerImpl - Project opening took 14879 ms
2020-03-27 16:25:25,197 [ 37402] INFO - .diagnostic.PerformanceWatcher - Indexable file iteration took 5180ms; general responsiveness: ok; EDT responsiveness: 1/5 sluggish
2020-03-27 16:25:25,202 [ 37407] INFO - tellij.diagnostic.LoadingPhase - Reached INDEXING_FINISHED loading phase
2020-03-27 16:25:25,390 [ 37595] INFO - CompilerWorkspaceConfiguration - Available processors: 8
2020-03-27 16:25:29,068 [ 41273] INFO - tartup.impl.StartupManagerImpl - Some post-startup activities freeze UI for noticeable time. Please consider making them DumbAware to run them in background under modal progress, or just making them faster to speed up project opening.
2020-03-27 16:25:33,321 [ 45526] INFO - ings.impl.UpdateCheckerService - channel: release
2020-03-27 16:25:35,233 [ 47438] WARN - DbmsConnectionExceptionHandler - Error Connecting to Database
com.haulmont.studio.backend.exceptions.DbmsConnectionException: org.postgresql.util.PSQLException: Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
at com.haulmont.studio.backend.ed.ddl.DbManager.dbExists(DbManager.java:286)
at com.haulmont.studio.intellij.project.resolve.CubaProjectResolver.lambda$nonGradleImport$4(CubaProjectResolver.java:212)
at com.intellij.openapi.application.ReadAction.lambda$run$1(ReadAction.java:53)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:932)
at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:57)
at com.intellij.openapi.application.ReadAction.run(ReadAction.java:53)
at com.haulmont.studio.intellij.project.resolve.CubaProjectResolver.nonGradleImport(CubaProjectResolver.java:200)
at com.haulmont.studio.intellij.project.resolve.CubaProjectResolver.lambda$proceedImport$3(CubaProjectResolver.java:162)
at com.intellij.openapi.project.DumbServiceImpl.lambda$smartInvokeLater$7(DumbServiceImpl.java:453)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:312)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:433)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:416)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:399)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:878)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:827)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:466)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:704)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:465)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: org.postgresql.util.PSQLException: Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
at org.postgresql.Driver$ConnectThread.getResult(Driver.java:409)
at org.postgresql.Driver.connect(Driver.java:267)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677)
at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:189)
at com.haulmont.studio.backend.ed.ddl.DbManager.openConnection(DbManager.java:306)
at com.haulmont.studio.backend.ed.ddl.DbManager.dbExists(DbManager.java:259)
... 30 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
at java.base/java.net.Socket.connect(Socket.java:591)
at org.postgresql.core.PGStream.<init>(PGStream.java:75)
at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:91)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:192)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:211)
at org.postgresql.Driver.makeConnection(Driver.java:458)
at org.postgresql.Driver.access$100(Driver.java:57)
at org.postgresql.Driver$ConnectThread.run(Driver.java:368)
at java.base/java.lang.Thread.run(Thread.java:834)
2020-03-27 16:25:35,340 [ 47545] INFO - ct.resolve.CubaProjectResolver - CUBA project imported successfully: C:/Users/matth/StudioProjects/kyuka
2020-03-27 16:25:35,340 [ 47545] INFO - io.backend.model.StudioProject - StudioProject.incModificationCount
2020-03-27 16:25:37,406 [ 49611] INFO - nd.maven.RemoteMavenRepository - [external_req] Load file content https://dl.bintray.com/cuba-platform/main/com/haulmont/cuba/cuba-global/maven-metadata.xml
2020-03-27 16:25:38,568 [ 50773] INFO - org.eclipse.jetty.util.log - Logging initialized @60717ms
2020-03-27 16:25:39,035 [ 51240] INFO - tudio.backend.stat.StatManager - Sending usage statistics
2020-03-27 16:25:39,250 [ 51455] INFO - onents.HTTPDescriptorsProvider - Using cached C:\Users\matth\.CubaStudio2019.2\system\cuba-studio\marketplace\available_app_components.json (updated at 3/27/2020 11:27 AM)
2020-03-27 16:25:39,269 [ 51474] INFO - rg.eclipse.jetty.server.Server - jetty-9.2.20.v20161216
2020-03-27 16:25:39,449 [ 51654] INFO - pp.StandardDescriptorProcessor - NO JSP Support for /studio, did not find org.eclipse.jetty.jsp.JettyJspServlet
2020-03-27 16:25:39,843 [ 52048] INFO - .server.handler.ContextHandler - Started o.e.j.w.WebAppContext@7acda6f7{/studio,file:/C:/Users/matth/.CubaStudio2019.2/system/,AVAILABLE}
2020-03-27 16:25:39,856 [ 52061] INFO - e.jetty.server.ServerConnector - Started ServerConnector@6bbecf19{HTTP/1.1}{0.0.0.0:30200}
2020-03-27 16:25:39,856 [ 52061] INFO - rg.eclipse.jetty.server.Server - Started @62062ms
2020-03-27 16:25:40,076 [ 52281] INFO - .backend.ExternalConfigManager - [external_req] Load config https://files.cuba-platform.com/cuba/studio/studio-config.json
2020-03-27 16:25:40,466 [ 52671] INFO - tudio.backend.stat.StatManager - Event has been sent successfully 200
2020-03-27 16:25:41,157 [ 53362] INFO - onents.HTTPDescriptorsProvider - Using cached C:\Users\matth\.CubaStudio2019.2\system\cuba-studio\marketplace\marketplace_view.json (updated at 3/27/2020 11:27 AM)
2020-03-27 16:25:41,704 [ 53909] INFO - .backend.ExternalConfigManager - [external_req] Load config https://files.cuba-platform.com/cuba/studio/studio-config.json
2020-03-27 16:26:07,987 [ 80192] INFO - rationStore.ComponentStoreImpl - Saving appDefaultFont took 17 ms, InlayHintsSettings took 15 ms, PropertiesComponent took 16 ms, XmlEditorOptions took 16 ms
2020-03-27 16:26:08,037 [ 80242] INFO - rationStore.ComponentStoreImpl - Saving Module: 'kyuka.portal-global.main'ExternalSystem took 16 ms
2020-03-27 16:26:08,579 [ 80784] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukaCompilerConfiguration took 16 ms, Kotlin2JvmCompilerArguments took 20 ms, ProjectCodeStyleConfiguration took 11 ms, TemplateDataLanguageMappings took 12 ms, libraryTable took 31 ms
2020-03-27 16:26:08,579 [ 80784] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 707 ms
2020-03-27 16:26:59,822 [ 132027] INFO - rationStore.ComponentStoreImpl - Saving appBaseProjectsState took 14 ms
2020-03-27 16:26:59,888 [ 132093] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukalibraryTable took 19 ms
2020-03-27 16:26:59,889 [ 132094] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 105 ms
2020-03-27 16:29:56,395 [ 308600] INFO - rationStore.ComponentStoreImpl - Saving appBaseProjectsState took 15 ms, FileTypeManager took 17 ms, TextMateSettings took 26 ms
2020-03-27 16:29:56,411 [ 308616] INFO - rationStore.ComponentStoreImpl - Saving Module: 'kyuka.portal-global.test'ExternalSystem took 16 ms
2020-03-27 16:29:56,566 [ 308771] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukaCommittedChangesCache took 17 ms, ExternalProjectsManager took 17 ms, GradleSettings took 16 ms, ProjectCodeStyleConfiguration took 16 ms, ShelveChangesManager took 16 ms, TaskProjectConfiguration took 15 ms, XDebuggerManager took 24 ms, libraryTable took 17 ms
2020-03-27 16:29:56,629 [ 308834] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 300 ms
2020-03-27 16:32:38,923 [ 471128] INFO - rationStore.ComponentStoreImpl - Saving appGeneralSettings took 16 ms
2020-03-27 16:32:38,993 [ 471198] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukaGradleSettings took 16 ms, KotlinCommonCompilerArguments took 18 ms, libraryTable took 18 ms
2020-03-27 16:32:38,993 [ 471198] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 101 ms
2020-03-27 16:32:58,292 [ 490497] INFO - rationStore.ComponentStoreImpl - Saving appFileTypeManager took 14 ms
2020-03-27 16:32:58,333 [ 490538] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukalibraryTable took 20 ms
2020-03-27 16:35:00,593 [ 612798] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukalibraryTable took 13 ms
2020-03-27 16:35:00,621 [ 612826] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 144 ms
2020-03-27 16:35:02,852 [ 615057] INFO - rationStore.ComponentStoreImpl - Saving Project 'C:\Users\matth\StudioProjects\kyuka' kyukaKotlin2JvmCompilerArguments took 20 ms
2020-03-27 16:40:03,585 [ 915790] INFO - ide.actions.ShowFilePathAction -
Exit code 1
2020-03-27 16:40:05,986 [ 918191] INFO - mponents.impl.stores.StoreUtil - saveProjectsAndApp took 114 ms