just for the record:
my laptop ran out of battery whilst recording.
i’d disabled an acpi battery device in order to reduce latency so the system gave no warning and just died.
after a reboot the recorded file was fine.
but C3 booted with the KERNALBASE error.
the only way out was a settings file nuke.
however, i used Beyond Compare to start adding my old config back to the reset one. (a big thanks to @brad for choosing .json)
when I got to the recordings directory the KERNELBASE error came back.
i then looked at the CantabileRecordingInfo.json
that had been trashed.
once it was deleted i could go back to using the original settings file, and everything was back to normal.
(a copy of the settings file is in the crash dump .zip)
hope this helps someone sometime,