This error indicates that the definition of a class has unexpectedly changed. This can be because of JDK version incompatibility as well. So, you can try upgrading your JDK, and if this doesn't work follow the below steps:
1.) Right-click on the job present in your repository
2.) Then select "setup routines dependencies"
3.) Delete all existing "User Routine dependencies" which are not being used in the current job
4.) Execute the job
This can be because you are missing on some jar. Once you provide the jar, the job executes fine.
Hope this will help!
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