Directv is my cable provider.
I had been having the problem on only the CBS app prior to last weekend. I reset everything on Thursday and it worked fine until today. Today I got the "We're sorry an error occured" message again.
I have found that if I disconnect from Directv, the error does not reoccur. I don't have to remove, restart, and reinstall the CBS app. I watch "free episodes" on the CBS app and all is well. When I reconnect to Directv all is well for the day. The next day I get the "We're sorry and error occurred" again.
Looks like the CBS app has problems playing well with the providers.