Issue with java.lang.NoClassDefFoundError: org/apache/velocity/context

[Anonymous]

Hi,
when I am trying to run a job, I get the following error message
Exception in thread "main" java.lang.Error: java.lang.Error: java.lang.NoClassDefFoundError: org/apache/velocity/context/Context
All my other jobs are working fine, but on this one job I get the error message above. What does it mean and how can I solve it?
Thank you very much!

[Anonymous]

Hi,
What does your job look like? Could you please give us more information about your current job?
Best regards
Sabrina