Failed to test the operation after adding the external jar file for java service

After adding the jar file in the integration service to test the Java service the Attached pop-up is showing with failed to test the operation message. Before adding the jar file able to test the operation and able to fetch the response successfully. Please suggest the required solution to fix the mentioned issue.

Hi Saran,

What version of Foundry are you using? I was able to locate a similar error message and the cause was due to the edition of Fabric/Foundry being used. Also, is this On Prem or Cloud? Thanks!