Can you share the details of the error you are seeing please? This should be in your console.
If you’ve not written your own Java Action, the problem is usually a conflict with two different versions of a .jar file in the userlib directory.
Actually in Checks button of MendixStudio screen its showing 1 error , when i click checks button, in bottom message its showing “ “ An error occurred while compiling Java action”.
And i did not write any Java action code in my app code.
I installed the below version of Mendix in my system .
Mendix Studio Version – 2.0.868
Mendix Version – 9.0.2.01120