I gave it another chance as I have some time. Still I can see that the migration of multi-ratings are not working. At the moment I’m in a stage that “existing” ratings from V1 are not shown after the migration and new ratings are not possible. Only overall is working.
I already reported it Already Reported.
It will not help to fix it at my sample server. The old server is still running and now I’m checking what will work and what not. The final migration will go once all bugs are fixed.
To open a new support ticket, first select the relevant forum and then click the "New Post" button. Example: You need support for the core plugin? Click on Core Plugin support and click on the "New Post" Button.