I just installed a new instance of Omeka and added the plugin Guest User. When I activate it I can no longer view the site, instead I see
Omeka has encountered an error
To learn how to see more detailed information about this error, see the Omeka Codex page on retrieving error messages.
I have tried enabling error messages but I still only get the message above. If I deactivate the plugin the site works again.
Any ideas how to fix this?