When I format the Switch using the official initialize option, then I have to use again the RCM JIG to hack the Switch? Basically I will have to begin from scratch, as the Switch was never hacked?
Not sure if the same issue, but I had an "exfat validation failed" and missing content error trying to go from 14 to 16, but according to this guide I pressed continue anyway and it worked regardless. Not sure if you still have the Continue option present, if not, then maybe try updating to the next firmware in line instead of skipping so many.