Adding Apple Music Apple ID into HOME app for Homepod
I got a Homepod this week and setting-up is definitely easy, since I got two different Apple IDs, I signed into iCloud account with A, and try to sign into iTunes and App Store account with B which I paid with a Apple Music Subscription, but what I got is "could not complete operation" sign constantly, ANYONE can help! Many thanks!😢
P.S. I tried different iPhones and iPad which in the same HOME associated.
iPhone 7 Plus, iOS 11.2.6