What you descrive still seems like a security issue and not a bug. Double check that the user role that views the page has rights on all the objects and references shown on the page.
Regards,
Ronald
I’m no expert, but do you also have the Mx Model Reflection module installed and configured with the appropriate securities? That might be a place to start looking for errors.
If this doesn’t work, maybe some screenshots of your setup could help in explaining the issue.