Backup fails with:
Error code: 1
Message: Internal error: record is greater then 32K
Jailed shell is enabled in cPanel and a lot of mounpoints are created in the /home/virtfs/ directory. The size of all strings listing the mountpoints exceed 32K.
In the next update of Acronis Backup plugin for WHM & cPanel, mountpoints of the /home/virtfs directory will be excluded from the calculation.
Meanwhile, you can use this script to unmount the BIND mounts for users who no longer exist or who no longer use a jailed shell environment.