Thank you for your guidance. I tested a Developer Token without the origin claim on Windows/Chrome using a minimal MusicKit Web v3 page. Initialization passed, and I clicked "Grant" in Apple's authorization window, but authorize() still rejected with AUTHORIZATION_ERROR after ~70 seconds. Allowing play.itunes.apple.com in CSP also did not fix it. What safe Console/Network diagnostics should I provide, and how? Feedback ID: FB25267497