I tried a couple of times but it made no difference. @Dan_Knight, have you seen about this before?
I updated DietPi first, to 6.21.1 without issues. Then I wanted to try the I-sabre-k2m but the error message above was displayed after a short while.
I have it working under the moniker of it being a “Hifiberry DAC”, but in Roon I cannot go above PCM192 our DSD64 (DSD works fine though, as DoP DSD64)