What is the problem? when try to reboot my pi 4 b via ssh remote side unexpectedly close network connection tried keep alive but still have the same problem
What did you already try to solve it?
serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support!)
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)