The real debrid issue could be a functon cache. Go to Kodi settings>System settings>Addons>Manage dependencies>
scroll down to Resolve URL and reset the function cache.
To force an update, it depends on the skin you have. Once in the addons sections, press the left arrow and the force updates should be there.
Keep us posted on the outcome.
Thanks RavRob, I wasn't familiar with that command, but I executed it. Unfortunately it didn't help. When I select a RD (Real-Debrid) stream, it starts with the stream I select, but then goes through all remaining RD streams without stopping until it reaches the end, and then I get the dreaded "no stream available" message. I have cleared and reauthorized my RD account and the account shows in good standing on the RD site. I have tried with multiple add-ons, but see the same behavior in all tested add-ons, so it seems it's not add-on related. I'm stumped!
I appreciate the helpful steps, and I'm hoping something works soon. I'm even tempted to uninstall Kodi and reinstall, but I know that I'll have a fun time (very hard time) creating all add-ons and repositories.
Any other suggestions I could try?