MINTEMP error leading to more odd failures  

MINTEMP error leading to more odd failures

I have a new MK3S+ that I have up and running for about a month and printed ~12 items with no real issues.  Three days ago, I received a MinTEMP error in the middle of a 19 hour print 🙁   sad.  I resent the printer and tried another print, same error within the first 2 minutes of the print.  I was printing with PLA and observed the bed temp to be correct at 60C.  Only, these fails also coincided with the printer telling me there's a firmware update.  I updated the firmware and was prompted to do the initial calibration again.  This went fine, but cursing my second attempt at first layer calibration ( ~ -1.545) the printer started the bed level check in the middle of the plate (not the front) and of course errored out and gave me another MINTEMP error.  

Is this a firmware issue or am I not doing something correct?  I'm very new to the maker thing and could be doing something really wrong 🙂