The shared library “Cloud Music Library” is not responding. (503)

So is this only affecting Apple Music customers? Because I'm not signed up for that and don't want to be; in fact, under iTunes Preferences, I chose to not show the Apple Music section. I'm following your idea but I'm also wondering why it's telling me this if I'm not with Apple Music. I do have iTunes Match, however.

this did not work for me ... actually lost access to all my iCloud music/itunes match songs after signing out (probably still just a server access issue)

Yeah, I did the sign off/sign in thing, and it worked for a little while. Now I'm back to the, "The shared library “Cloud Music Library” is not responding. (503)" thing. I see this as system wide, and not to be worried about it. Apple will fix this bug/glitch, and install a couple of new bugs. Take a deep breath, go to your backup music (Google, Amazon, etc), and listen away.

Same here and no firewall. iTunes and Apple iMatch are not worth the effort - Apple obviously doesn't care.

I just tried adding my computer to music match (the button is now in iTunes store as opposed to on player) even though its already been added and so far I haven't received the pop-up. Crossing my fingers that worked! >_<

Also, I can play my music just fine, but it's music that's on my hard drive as well. So I'm still confused why this error message is popping up and what the actual error is.

Everyone is having the issue as of 30 minutes ago. Apple does care, just be patient and give them time to fix it.

plamond's suggestion worked for me. seems like they now want you to "drive by" apple music to get to your/my music. for now, no error ...

Thanks Melissa- but Apple used to care MUCH MORE ten years ago before they became a mega Corp. And their support used to be without match.

I should mention I too don't have Apple Music, just Match. Have no plans to sign up for Apple Music. So far still no pop-ups...

I signed out, turned off iTunes, reopened iTunes, signed in, and waited as Apple reconnected. And then got another popup. So the patient route it is. I'm submitting this with the beta feedback assistant as well, so hopefully we'll have a response soon.

Add my name to the list as well, same problem here.

Just started to happen to me too, has to be something to do with Apple Music as only signed up two days ago, been working fine till this afternoon.

Add me to the list of users getting this issue. Running a PC laptop on Windows 8.1. iPhone can access the cloud library with no problem. Actually, I'm glad I found this thread, as I was sure my company had remotely locked iTunes down. Happy to sit and wait for Apple to fix (as long as it's not too long!)

MP