coming up on 2 hours now and still no error message. Posting this as a tentative resolution:
cd /etc/mysql/mariadb.conf.d
Sudo nano 50-server.cnf
find the line with #max_allowed_packet = xxM and remove the # and change the value so that the line reads:
max_allowed_packet = 256M
Save the file then reboot the server or restart mysql
I hope that saves someone some frustration. I'm (tentatively) happy to put this to rest.
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