Sometimes it happens that you are being constantly logged out from BackOffice when you select any page from menu.
It may come from moving page from one hosting to another.
Anyway the solution is very simple.
You need to access Your phpMyAdmin first. Next, run the following SQL statement:
UPDATE ps_configuration SET `value`=0 WHERE `name`="PS_COOKIE_CHECKIP";
And that’s all! Seriously. Everything should work now flawlessly.
By the way – This is just a setting from Administration > Preferences menu which we are modifying via SQL because our BackOffice connection is broken and this value won’t be saved from admin panel.