I've just upgraded my 7.2 instance to 9.0.2.
I've worked through most issues but there's this error with FXM I can't seem to find out why.
The FXM dashboard looks fine (as in no visible red errors), but when I go Add an External Website, the add new site form shows a "Could not load item" error, and then I see the following request failing in the dev tool
I am an admin logged into the default admin/b account, but the error seems to be that I'm not authorized...?? Does it ring any bell for anyone?