One thing that maybe helpful for some if to indicate how to get to the Packages section on the new UI...On the right side of the menu on the top, find 'Content' then click on the 'Packages' button....
I've created a post for these joining issues here: https://www.simracinghub.com/forum/5777-issues-joining-server
If my instructions are incorrect please let me know....
lets try this again , go to your packages , uninstall anything with the 2021 date "everything. then delete it too
download the updated track and install it in packages.
then go to the serve...