After upgrading from 10.2.7 to 10.3.0 I got some warnings about deprecated modules and some cache setting.
I have been able to solve almost all the deprecated modules by installing the contrib modules (e.g. forum, books, activity, etc.) just following the guidance provided in the admin area.
I upgrade today from 10.2.9 ro 10.3.0 and I can't update any pages as the update pages show only the field to update the resume (and it works) but I can't get the content page on screen ...
I have a multi-site configured with 4 sites. 3/4 Updated without any issue to the last version from 10.2.0 to 10.3.0. However for one of the 4 sites I'm no longer able to access the admin pages it throws