When you get to the box that asks you to explain your claim, copy/paste the contents of your license pdf.You can access your pdf license by going to your MorningLightMusic.io account: Account>My Orders>Invoice (right hand side of the order).
If the claim has not been released within 24 hours feel free to email firstname.lastname@example.org and they can help you clear the claim.
NOTE: A Content ID Claim is NOT a Copyright Strike. Copyright Claims do not affect the status of your YouTube Channel in any way. MorningLightMusic will never issue a Copyright Strike on YouTube.