iTunes keeps interrupting when working offline

Thanks a lot, this worked for me as well (El Capitan, MBP retina 13-inch Late 2013). Apple should have fixed this sort of real issues, instead of tweaking UI...

Sign out of the iTunes Store.

Does this happen when iTunes is not running? If not, just quit it.

Yes - This happens to me too and I HATE IT! I do a lot of writing offline and I like to listen to my iTunes music library while I'm working. I do not want to be bothered by an iTunes pop-up telling me it cannot connect to the iTunes store. I am not trying to connect to the iTunes store. I already know that I'm not connected to the internet. If someone knows of a fix for this I would like to know about it. Or if Apple fixes this I would like to know about it.

We live in an ever increasing internet dependent world but you should still be able to use your devices offline without issue.

There's a recent thread about this -- which I can't find at the moment, of course -- in which a few people who were experiencing this problem posted follow-up comments reporting that the problem had eventually fixed itself. FWIW, this is exactly what happened to me -- I was plagued with "We could not complete..." notices for a few hours, then it stopped.

I don't recall that anybody figured out exactly what was causing the problem, or why it went away. Another iTunes mystery.

I get this on every song play which freezes the screen until 'ok' is triggered. Also a red exclamation mark in the top right corner and when pressed it says Apple support cannot come up with any answers - the last advice was to reinstall Yosamite 15 - but this didn't rectify.

prob hasn't been fixed as I'm still getting the msg when I'm offline trying to play mussic

I'm getting the same msg.. its getting annoying

I am on OS X El Capitan. Following trick worked for me:

Connected my Mac once to the internet, launched iTunes, the error went away. The error does not show up even if I disconnect from internet. But don't quit/restart iTunes while offline, you may keep it minimised, hidden. If I restart iTunes while offline, the error reappears.

if im playing iTunes while online then disconnect, I can play songs without getting the msg but if u click the x box and relaunch iTunes I still get the msg when I play the song

What am I to do

i have this same ******* problem after i updated i iphone to ios 10.2

at first the itunes failed to update my iphone and since then i'm having this problem "apple u really need to do something about it, it has started to **** me of because there is not just one pop up it keeps on increasing with the no. of songs played."