Googled something about servers being the problem - cannot see what else it should be
(below: the untouched code >> no results) ... and yes, did the exact same as you (had same problem on my phone, that even roamed/mobile data)
Hello. The sessions on https://www.w3schools.com/php/php_sessions.asp are suddenly not working on Chrome, Firefox and Opera?
Other examples do: https://www.section.io/engineering-education/getting-started-with-php-sessions/
Any suggestions? ... or even better any feedback/call-to-action from developers on the tutorial pages? //br