one of the portals in my dnn instance (7.2.2) suddenly stopped working properlY (other portals on the same dnn instance work fine):

• admin > pages: treeview becomes empty after selecting page (CtlPagesContextMenuItemClick exception in log)
• not able to add new pages (TabPermissionCollection.AddRange exception)
• not able to save html module text changes (TabPermissionCollection.AddRange exception)

I add the bug reports below:

https://dnntracker.atlassian.net/browse/DNN-5700

and

https://dnntracker.atlassian.net/browse/DNN-5701

does anyone happen to recognise this?

tx in advance