Error: Call to a member function label() on null in Drupal\group\Entity\Controller\GroupListBuilder->buildRow() (line 131 of modules/contrib/group/src/Entity/Controller/GroupListBuilder.php).

Jon Pugh → made their first commit to this issue’s fork.

The problem is that the entity that is referenced is missing.

The new MR is against 3.2.x. It simply returns "" for a label if none is found. This is important because the relation entity still exists, so in order to be clickable, label has to be something.

See https://git.drupalcode.org/project/group/-/merge_requests/107

This is what it looks like:

i'm having the same issue, and adding the ternary operator to check for empty object returned by the getOwner method fixed for me. hope this helps.

#10 fixes my issue. I encountered the error after deleting all group owner and members from the admin/people page. I selected to delete the users' content groups, but that was not the case. Perhaps the order of user deletion had something to do with it.