Hi @kttn,
This usually happens when the .sock file that supervisord uses to keep track of cryosparc processes is deleted. This file lives in the /tmp folder, so if that folder was wiped out for any reason (quite common), you’ll see this happen.
Theres no way to reconnect to the living cryoSPARC instance, so the next thing to do is to kill off the running, zombied cryoSPARC instance, and start a fresh one.
ps -ax | grep “supervisord” (kill only the process that is running from your cryosparc install)
ps -ax | grep “cryosparc” (kill all the matching processes related to your cryosparc instance)
ps -ax | grep “mongod” (kill only the process running your cryosparc database)
e.g. kill 82681
Then start cryoSPARC again: cryosparcm start