Error on upload PDF with restriction

Support
#1

Hi I am having error when upload PDF with restriction . Anyone can help ?

Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method queueUploadFinished in com.haulmont.cuba.web.gui.components.WebFileMultiUploadField$$Lambda$1518/1878657085 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:729) ~[vaadin-server-8.14.3-1-cuba.jar:8.14.3-1-cuba]
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:399) ~[vaadin-server-8.14.3-1-cuba.jar:8.14.3-1-cuba]
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:363) ~[vaadin-server-8.14.3-1-cuba.jar:8.14.3-1-cuba]
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1217) ~[vaadin-server-8.14.3-1-cuba.jar:8.14.3-1-cuba]
at com.haulmont.cuba.web.widgets.CubaFileUpload.fireQueueUploadFinished(CubaFileUpload.java:497) ~[cuba-web-widgets-7.2.20.jar:na]
at com.haulmont.cuba.web.widgets.CubaFileUpload$1.queueUploadFinished(CubaFileUpload.java:95) ~[cuba-web-widgets-7.2.20.jar:na]

#2

Hi,
Please present full exception stack trace and message.
The snippet you’ve posted is not enough to understand the cause of the problem.