I have had similar problems with TT on iMac systems. Uninstalling TT and reinstalling TT didn't work for me. What DID WORK was to remove completely TT from my iMac. There is a TT webpage that describes this process. Follow this process and then reinstall the 2021 version of TT. Cleaning up old files worked for me. My guess is there is a deprecated file or object from an older version of TT that is causing the problem. Good luck!
