mail has no content-fix

Issue: “mail has no content”

I also posted this in the Ventura forum

This is not the easiest fix but the only one that worked for me (should work for either Monterey or Ventura):

 After trying every suggestion, I finally (as a last resort) booted into recovery, erased my drive and reinstalled the OS (Monterey, 12.6.3).  I then migrated my files, apps, etc. from my TM backup.  This fixed the mail issue.  I tested this for the last 7 days (150 emails) and the mail is rock solid.  I’m guessing somewhere along the way after some OS security update the issue started. 

NOTE:  Before reinstalling the OS I tried updating to Ventura but the issue continued.  I also tried just reinstalling the OS not touching the data volume but that did not work.  I had to erase the drive and start over.