If you know some web development, you may be able to help me solve the issue of "can't retrieve any favorite videos".
On tiktok.com, open devtools, go to the network tab, filter for "api/user/collect/item_list", this is the end point to retrieve Favorite items in json.
2 things can trigger a request to this end point, (1) if you view your own profile on the top right, then go to "Favorites", (2) if you click the 2nd button "Download all my favorites" in the myfaveTT extension sidebar.
For most users, these 2 actions will trigger the same fetch request, and get the same json in response, which contain an array of videos. However, for a portion of users, including you, 1 works but 2 doesn't.
If you can compare the two requests and find out why 2 doesn't work, please email me at info@myfavett.com, so I can fix my code. Thanks!