Hi,
thanks for the report.
Is R:\Temp on a RAM drive, portable or some kind of a mounted drive?
Meanwhile try without the KB5001412, to avoid that boot.wim error if the above didn't help.
I haven't seen this in my tests, could be due to that temporary folder.
It states error 3 (ERROR_PATH_NOT_FOUND) on saving boot.wim, makes no sense - only if boot.wim's 'R:\Temp\NLTmpMount02' disappeared in the meantime, just guessing.