I have the exact same issue. I experimented a bit and it seems that the TAC website doesn’t display correctly in Google Chrome, with the Daily Challenge section only showing a “critical error”. After opening the website in Microsoft Edge, however, everything works just fine for me, including the Daily Challenge section. Hope this helps.
If this doesn’t work for you and you need support, click on the “(?) Support” link in the bottom left, or go to the TAC Help Center directly at https://help.tonypolecastro.com/