I redeemed the free MLB through T-Mobile last week on the 27th but when I try to watch in the app I get the attached error.
When the promo was available I redeemed it through the T-Mobile Tuesdays app and it shows as redeemed.
I also have the promo code but didn't want to post it in case it could be used by someone else, which I don't think it can but didn't want to take the chance. I confirmed that I am signed into the app with the correct email address that I used to sign up through the T-Mobile Tuesdays app too.. I tried contacting MLB Support a week ago but haven't heard from them yet.
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