Bug report submitted

For some reason the script does not detect you partitions as a DietPi installation. Also this message is odd: lsblk: unknown column: MOUNTPOINTS
Any ideas @Joulinar @MichaIng ?

Maybe you can try with another SD card, if you have time and are willing to do so?
You also used this image, right?
DietPi_RPi-ARMv8-Bullseye.img.xz