Usually I can access Octopi from browser in my PC but no longer works. This happened after I installed a demo game from Steam which during initial setup, a windows firewall window showed up and asked me for permission. I just hit the escape key. Uninstalling the game does not fix the problem.
No problem in accessing Octopi from a Mac.
What did you already try to solve it?
Uninstall the game and rebooted both the PC and the Pi.
Not an issue from octopi.
If the game installer changed firewall settings, since octopi uses the standard port 80, nothing would work. It sounds like maybe a hacked version of a game and not a regular demo version. I have quite a few games from steam on various computers and none of them have caused any issues accessing octoprint