Cannot start snap, stuck after "Watches established"

Problem fixed. I looked the logs carefully and found out that a file was missing

2021-09-03T12:20:29Z cluemaster-mediadisplay.cluemaster-mediadisplay[1560]: /snap/cluemaster-mediadisplay/42/usr/local/bin/x11_kiosk_launch: 19: bin/prepare-launch: not found

updated the location and now its running…

Thanks @ogra. You have been very helpful.