Problems upgrading from 9.1.8 to 10.0.10

We managed to upgrade our owncloud v8.x install to That all went fine. But when we migrated from to 10.0.9 all sharing information was gone. So users that shared folders were no longer showed as shared and people that had access to shared folders didn’t see those anymore. The info is still in the mySQL database but doesn’t get applied.

I even tried exporting the working mysql db from a 9.1.8 version and imported it into the 10.0.9. But also that didn’t fix it.

It’s running it on debian and php 7.1

Anyone has any idea what that can be?