From Real Debrid website:
You’re getting “need resolve” or “cannot make a new request because the previous response is still open: please call response.close” error.
This issue has nothing to do with Real-Debrid so we can’t help you."
“Please try to clean the cache of third party app you’re using and re-authorize.”
Sounds like they’re saying it’s a programmer error.
I searched for a movie before trying this advice. Every real debrid link had resolve with the link. I clicked each and they all worked. I then cleared cache and reauthorized. Brought up same movie. Many real debrid links, only 1 had the resolve thing.