It's very hard to know from AVFoundation error codes what is the exact error. For instance, I see the following message and don't know what error code means?
AVFoundation error codes -11800 & -16364
Hello,
First, I'd recommend that you file an enhancement request for more detailed error messages wherever you are receiving this error code (-11800 == AVErrorUnknown) using Feedback Assistant.
Then, I'd recommend that you request technical support for this issue, as figuring out what the cause of the error is will likely require a focused sample project.