Gradle Error: could not execute

I started Cuba Studio and in the Settings I filled out Gradle Home with “C:\users…\gradle” and then pushed button
"Apply and proceed to projects". A window opend …please wait" and the I got the error message from Gradle:
"could not execute build Gradle using installation “C:\users…\gradle”.
What is wrong and how to proceed to open a project?
Tahnsk for a quick response,

obsolete: left the Gradle Home blank, no it works