Hello!
The failure probably comes from the fact that Eddie service can be installed only on systemd based systems. MX Linux by default uses SysVInit, according to the documentation. We deliver the AirVPN Suite for Linux that supports SysVInit too. In the Suite, Bluetit is a daemon that can run both on SysVInit and systemd based systems. If you are interested:
https://airvpn.org/forums/topic/66706-linux-airvpn-suite-200-preview-available/
Kind regards