Installed activities not appearing in their menus, only an empty page displays

Please tag your post with #pc and/or #xbox.
#pc
Are you on Steam or Microsoft Store version?
Steam
Are you using Developer Mode or made changes in it?
No
Brief description of the issue:
Installed activities are not displaying inside their respective menus. The menus open, but don’t display anything I have installed. This includes bush flights, training, discovery flights, and landing challenges.
Provide Screenshot(s)/video(s) of the issue encountered:

Detail steps to reproduce the issue encountered:
Install activities and go to the activity menu.
PC specs and/or peripheral set up if relevant:
N/A
Build Version # when you first started experiencing this issue:

1.20.6.0