Hello Minakshi,
Have you tried to uncheck the Java Temporary internet files setting "Keep temporary files on my computer" ? If not, please uncheck this flag for test pursposes.
After that, re-open workbench to check error mentioned.
This will not make system not use stored java files anymore, so we can define if they are related to this issue.
Please let us know the results.
Best regards,
Raphael