I just upgraded my site from J3.10.12 to J4.4.9
Initially everything seemed to go very smoothly. I could move back and forth within the back-end without problems
and the front-end seems to be working well, although with the new cassiopea template, the layout needs rearranging, but that's for later.
I updated a few components/plugins to the new J4 version. The updates seemed to have worked fine
however after a few minutes (after pushing on some link I reckon) the
message appeared, and to be honest don't really know what to do in order to restore the back-end functionality.An error has occurred.
0 Class 'JRequest' not found
The front-end continues to work well apparently.
What updates did a do? .... Akeeba, the Spanish Language Package, PhocaGallery, ..maybe a couple of others which now can't remember....
Any help appreciated