I only use default skins but multiplayer has permanently been disabled on my world due to a “restricted content pack”

Multiplayer has been permanently disabled on my world due to a restricted content pack (player skin), but I have never bought/downloaded any content packs on my device and I have only ever used default skins. multiplayer has previously worked on this world before, but for some reason, the attached message keeps popping up telling me that the default skin I’m using is restricted in multiplayer! Now my friend will never be able to join this world ever again and I am VERY upset!