The Favorites links are gone from the profile menu and account page as shown in Shakedown's screenshots, unless you clear *all history* in your browser (check all boxes to clear everything). There must have been some domain changes with sessions and cookies recently. Probably an oddity between curseforge, the "authors" subdomain, and twitch merge.
Strangely the issue was not resolved after clearing all cookies with curseforge or twitch in the name. I had to clear EVERYTHING, which makes me curious why the cookie causing this error did not show in results when searching cookies with curseforge or twitch in the name. But I discovered the fix after testing in another browser and thought I'd share.