After changing some settings, all emails printed as plain text only, even past emails.
I started setting up Thunderbird on May 8, after I got my new windows 11 computer. I added 6 of my most important email accounts (different providers). Today, I went through settings to make things better (I thought). Immediately after, all my email accounts (both current & previous messages started printing in plain text only. I tried to fix by going to view, message body as...simple text, restart, then back to original HTML. Then, restart again. All this to no avail. I am sure it is a setting because until today, all were in HTML.