My daughter has this on iOS. It affects about 10 of the worlds she owns, and it seems permanent. This content has been unavailable to her for over a month.
One more thing in case it's relevant: I have bought minecoins successfully for this child's account in the past. And the account where it succeeded belongs to a 9-year-old; the failing account belongs to a 7-year-old.
My daughter has this on iOS. It affects about 10 of the worlds she owns, and it seems permanent. This content has been unavailable to her for over a month.