Another user observed
Please can you post the output of (replace the QUERY_PORT value as needed. 39001 assumes you connect to the CryoSPARC GUI via port 39000.):
cryosparcm stop
ps axuww | grep -e cryosparc -e mongo
ls -l /tmp/*sock
QUERY_PORT=39001
ss -lp "( dport = :$QPORT or sport = :$QPORT )"
If the ps and ls command display no processes or files, respectively, you may also try
cryosparcm start and post the output.