Resource packs won't unlock or load since update

Since the update I'm unable to unlock or load resource packs bought from the Marketplace (except for the free Deep Sea world I recently received). When I do open worlds they do not function properly, and I'm still unable to open the resource or texture packs associated with them. I have tried logging out of my xbox account and logging back in. I am unable to download the packs again from the store, although they show up as purchases under my account, and older saved worlds do not function either.