I unable to understand what the error is about when trying to the run process. Logs:
Unexpected error executing process: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 [Response Message: Forbidden, Name: Forbidden, Code: 403] Unknown failure Index: 0, Size: 0 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
The process you're running is attempting to call a web service or access a page. It doesn't have the correct entitlements, so the server is returning a 403 error. The process doesn't know how to handle that and is throwing an exception. Maybe someone can give you a better answer if you include the source code of the process you're trying to run.