When there is at least one action available that implements Drupal\views_bulk_operations\Action\ViewsBulkOperationsPreconfigurationInterface
then Views UI breaks.
In the logs following error will be found:
Error: Call to a member function broken() on null in Drupal\views_ui\ViewEditForm->getFormBucket() (line 1129 of /Users/mxh/projects/drupal/web/core/modules/views_ui/src/ViewEditForm.php).
views_bulk_operations_example
provides such action/admin/structure/views/view/content/edit/page_1
Not haven't found a solution, but at least I found the place where the bug is triggered:
https://git.drupalcode.org/project/views_bulk_operations/-/blob/4.2.x/sr...
At that place, the view is being initialized, especially including its handlers. Maybe it's too early to initialize the view at that point?
When commenting out the line for initializing the handlers, then the error does not show up. But it was probably added for some reason, so just removing that part would probably have unwanted side effects.
Active
4.3
Actions