Fatal error: Class 'EntityReference_BehaviorHandler_Abstract' not found in /app/modules/og-1.x-2.x/plugins/entityreference/behavior/OgBehaviorHandler.class.php on line 6
I just installed OG on a vanilla install to refresh my memory and got this error when trying to add a new content type and designate it as a group. This may relate to a piece of EntityReference that hasn't been ported yet.
Note that after this error, the content type is set up and designated as a group. But when I then try to add a content type for group content, I get the same error but it is now persistent and I can't get past it.
I just installed OG on a vanilla install to refresh my memory and got this error when trying to add a new content type and designate it as a group. This may relate to a piece of EntityReference that hasn't been ported yet.
Cross-reference: https://github.com/backdrop-contrib/entityreference/issues/25#issuecomment-1026293433