mount_filesystems on iPad Air 2 15.7.3 / A8X permission denied

[delacroix0815]

This shows up on the SSH shell after ./sshrd.sh ssh and running mount_filesystems:

localhost:~ root# mount_filesystems
mount_apfs: volume could not be mounted: Permission denied
mount_apfs: volume could not be mounted: Permission denied
seputil: can't open '/mnt1/usr/standalone/firmware/sep-firmware.img4', errno: No such file or directory(2)
seputil: rejecting zero-byte firmware
seputil: failed to load /mnt1/usr/standalone/firmware/sep-firmware.img4 in  mode
mount_apfs: volume could not be mounted: Permission denied

hostinfo gives:

localhost:~ root# hostinfo
Mach kernel version:
	 Darwin Kernel Version 21.6.0: Sun Jan  8 22:44:57 PST 2023; root:xnu-8020.241.19~1/RELEASE_ARM64_T7000
Kernel configured for up to 3 processors.
3 processors are physically available.
3 processors are logically available.
Processor type: arm64 (arm64 v8)
Processors active: 0 1 2
Primary memory available: 1.92 gigabytes
Default processor set: 6 tasks, 173 threads, 3 processors
Load average: 1.27, Mach factor: 1.72

Device is an iPad Air 2 (5,4) with an A8X Processor.