Thank you sV3 and Andreas, this appears to be the problem. I have recompiled the kernel with binfmt_misc and it now works.
John On 03/03/2021 11:24, s3v wrote: > Hi, > >>> -- System Information: >>> Debian Release: bullseye/sid >>> APT prefers testing >>> APT policy: (500, 'testing') >>> Architecture: amd64 (x86_64) >>> >>> Kernel: Linux 5.10.13-20210224 (SMP w/2 CPU threads) > > Maybe this kernel has been compiled without binfmt_misc support? > > Kind Regards >