I know what the problem is, as I saw the same thing on an MX Linux install:SPL ERROR - Undefined Command
POSITION : 0x0 (0)
SYSTEM : emil/SPL/SPL
LINE : 481
VERSION : SPL_V10.48.01 09-17-2015
ERROR CODE : 11-1114
https://forum.mxlinux.org/viewtopic.php ... 1&start=10
However, now that I am using Debian Buster, I am not sure what Debian package I need to sort this out. Not going to try installing an MX Linux testing package and risk something breaking...