Capella migration from 5.2 to 6.1 viewpoint missing

Hello, I’m trying to migrate a capella project I create with CAPELLA 5.2 to 6.1 but I have an error message and i cannot proceed. I tried to compare the lists of plugins installed in both of the versions but I didn’t find any clues on the source of the problem.
You’ll find attached a screeshot of the error message.

Thank you for your help.