Imunify360 failed to start with errors: "Start request repeated too quickly" / "Failed with result 'exit-code'"

Issue

Imunify360 cannot be started with errors like:

imunify360.service: Start request repeated too quickly.
imunify360.service: Failed with result 'exit-code'.

1. Check the output of `journalctl -u imunify360.service`. Most likely, `libssl` is broken and you will see:

imunify-service[3773042]: ImportError: /opt/alt/openssl11/lib64/libssl.so.1.1: file too short

2. If it is true, run the following commands:

# service imunify360 stop

# yum reinstall alt-openssl11 alt-openssl11-libs alt-curlssl11

# systemctl daemon-reload

# service imunify360 start

Another cause could be a corrupted imunify360-resident.db, if the above does not work, make a backup of if:

mv /var/imunify360/imunify360-resident.db /var/imunify360/imunify360-resident.db.backup

Restart the Imunify360 agent:

systemctl start imunify360-agent

And tail the console logs to check if everything is now working as expected:

tail -f /var/log/imunify360/console.log

`libssl` is broken.