Antelope account have a maximum of 12 characters

[DenisCarriere]

The Regex used is not valid for account names, account validation should be a maximum of 12 characters

Note: table names & scopes can have up to 13 characters, but not accounts cannot

[roadscape]

Thank you for the report! We had not been aware there are additional restrictions for accounts beyond what's allowed for account_name type; IIRC, we used EOSIO/eos#955 as a reference.

Confirming this issue:

3050000 action_validate_exception: Action validate exception
account names can only be 12 chars long

We also need to investigate if this applies to AtomicHub schema names.