I have an Instagram business account which was created from a preexisting Facebook business page, so all photo sharing from IG to FB obviously was automatically set up and everything worked great! Well I had to switch the IG account to a personal account for literally just one day. When switching IG back to a business account, though, I suddenly lost the ability to share photos to FB. I've tried everything out there on the internet from deleting/reinstalling the IG app, disabling and reinstalling the IG app inside FB, unlinking/linking my FB account in IG... nothing is working so far. Please help!