The cribl service should not be run as root, some users have run into file ownership problems if they start the service as root and subsequently chown the cribl home directory as described in the docs.

If the files in $CRIBL_HOME are owned by user cribl and the service still won't start, check that the files in /tmp/cribl_stream are also owned by the cribl user.

If not, you can use this command to change the owner. You may need to use sudo to do this if your user does not have permission.

chown -R cribl /tmp/cribl_stream