There is nothing necessarily wrong with your artwork, but as part of our service, our Prepress team wanted to warn you about a certain issue (such as a colour warning, text very close to the edge or even a spelling error if they notice it).
Carefully read and ensure you understand all messages included with your proof.
When you see the blue bar with the speech bubble and the text “Please review the message issues by our Prepress Team." on your Proof Approval page, please click the arrow on the right to view the notes.
You may choose to correct this issue (click the red Decline Proof button and upload new/corrected files), or ignore the warning and proceed with printing (check the box in front of "I have reviewed the message above and wish to continue to approve this proof" and click the green Approve Proof button).