I'm trying to create a Media Services Key in developer.apple.com. The issue is it's grayed out. Does anyone know why? It says
There are no identifiers available that can be associated with the key
I had the same issue and found the Create a private key to access a service procedure, in which step 4 says "If the Media Services checkbox is disabled, you need to register a media identifier first."
That step links to the Register a media identifier procedure, which instructs how to create an identifier in the developer account section titled Certificates, Identifiers & Profiles. Here it is:
Register a media identifier