For people searching solution for this issue... We had official Android application that was logging in and installing extension on Panel and that caused problems. Took me awhile to find the source of the problem. Just go to the Extensions menu item from the Panel on the left and remove Mobile...
Hi everyone,
After upgrading Panel to latest version every action I try to do throws a system notice and fails to do what I expect it to do. This is one of the errors I keep getting. It's not even an error, just a annoying PHP notice which I have no idea where to disable...