I get this message on one of my Octopi
Your browser is too new,Some features will not work properly.Please download 44.0 or earlier.
What did you already try to solve it?
rebooted the program
Have you tried running in safe mode?
It won't allow me to boot Octopi
Did running in safe mode solve the problem?
WRITE HERE
Systeminfo Bundle
You can download this in OctoPrint's System Information dialog... no bundle, no support, unless the reason you couldn't retrieve the bundle is your network issues
WRITE HERE
Additional information about your setup
Hardware you are trying to connect to, hardware you are trying to connect from, router, access point, used operating systems, ... as much data as possible
WRITE HERE