Seahub fails after upgrade to 7.1.4

Upgraded from 7.0.5 to 7.1.4 on Raspbian Buster. Followed upgrade instructions, update script ran without errors. The seafile services starts without errors. Running service seahub start fails with ModuleNotFoundError: No module named 'ccnet'.

Any idea how to solve this issue?

Yes. Please use the search function. This error was discussed multiple time in the last few weeks. Pretty sure you will find the right answer in one of the older post.

Sorry for the overhead. Like @Cryos in his thread I could not find a thread about the specific error message when using the search function of the forum. Nevertheless the problem was solved here.