I was just replying. If this happen again or to someone else: you had the 911 cup selected, see on top right of your screenshots. You need to click on the "Series" icon, then select "All tracks& cars" and click on "Accept".
That's weird, glad you got it sorted then! #JustAnrF2thing probably...In the series selection there was also only the 911 cup I could choose from along with one that said s397 something or other which the accept button was greyed out on so it couldn't be selected.