Try 91b4, which claims to fix 'various printing issues'.

https://www.thunderbird.net/en-US/thunderbird/91.0beta/releasenotes/

I don't think the printing fixes cover this. This sounds like an error is occurring, or you're one of the people for whom it takes a long time to fetch printer information. You can try opening the menus: `Tools > Developer Tools > Error Console`, then clear the current errors and try to print to see if any new errors appear during printing. It would also be good to know if you have (or had) the same issue with printing in Firefox with its new printing UI. Either way, please file a bug at https://bugzilla.mozilla.org/ and reply here with the link to that bug.

Jonathan, I deleted the error files. Retried to print. same errors in Thunderbird. Printing properly in Mozilla Firefox. Error says: Not supported: Didn't end up with a content viewer. Any other suggestions?

I am having the same problem with 91.2.1 Printer is grayed out and all of the help replies refer to a menu setting that is not there tools > options Options is no longer there. All of my other programs print fine to my default printer. Thanks in advance.

After updating to ver 91 my print no longer responds. clicking on it does nothing. Everything else in the new version is fine. Side loaded an older version 89 and the printer works just fine. I didnt do anything except to upgrade to 91 when this all happened. So now I have two Icons TB No Print and TB print. TB Print is ver 89. I run windows 10 pro.

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