Lightning to digital access adapter

I was able to watch movies I bought from the I store and downloaded them into my phone using the adapter and now I can’t. I only get the message saying can not play movie, the connected display is not authorized to play protected movies.

these movies are bought and paid for through apple so why can I not use this adapter any more????

I even went out and purchased a new Apple adapter thinking that maybe the issue. It’s not.

please advise

thanks.