Octoprint web interface won't load

Octoprint was working perfectly for me over the past year with no issues a few days ago I tried to access the web interface to start a print but I was not able to get in it just says (this site can't be reached).

I have tried resetting the wifi details to get it to connect with no success

I'm using a pi3 B+ connected over wifi
Creality CR10 S

thank you in advance to anyone that can help me

How are you trying to access OctoPrint? IP address, octopi.local...?