Symptoms
The Backup Console displays an error in the backup activity: The SnapAPI kernel module is not loaded for the kernel 4.18.0-305.10.2.2.lve.el7h.x86_64 that is running in this system. Install the module for this kernel version, and then retry the backup.
Affected environment
CloudLinux 7-series (most typically this is CloudLinux release 7.9 (Boris Yegorov) using a so-called "hybrid kernel".