An infuriating glitch has lasted for months now. When Account Center came out, my IG and FB were linked really well. It was extremely efficient to just push a button to post to both. Then something happened on the back end, and the connection was lost. Ever since then, it gives me an error msg: Can't use this account" when I try to reconnect my IG and FB. It refuses to relink the two, and is so frustrating. Please help me fix this!! I deleted both's caches, storage, reinstalled. Nothing helps!