A new validator has been implemented in the system, which consists in making the composer field mandatory for the channel Claro Música. This change has been carried out for this specific channel as, according to the Brazilian law requirements, they enforce the composer information to be sent within releases metadata.
Therefore, any content sent to this channel will from now on need to include a composer. If the composer info is missing, the system will display an error in Claro Música’s Actions section.
In order to override this error, you should go back to the Release info tab and add a Composer in the Artist(s) dropdown.