iTunes/Apple Music metadata error - can't work out what's missing

I’ve received a message from the Quality Control department that the metadata for a computer-generated release hasn’t been correctly provided, specifically to meet the requirements of iTunes/Apple Music. However, I can’t find what’s wrong with the metadata that has been queried – I have entered, for each track, my name (Gareth Glyn) and instrument (Programming) as Apple Music requires, and, as far as I can make out, there isn’t anything else I can add for a computer-generated performance. Could anyone advise?
Apple music error message

Hello @GarethGlyn
It should be fine - tagging @Noelia @Melani for confirmation.

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