What is the problem?
Got a confirmation that my Octoprint was backed up - but can't find where that file is located
What did you already try to solve it
looked in the octoprint folders - is there a specific extension?
Have you tried running in safe mode and if so did it solve the issue?
serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support! Not log excerpts, complete logs.)
Additional information about your setup
OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible