I'm thinking it could be the documents needed to verify you for Shopify Payments? If you submitted some documents and they weren't able to be verified, then you might need to submit some other documents which can fully verify you for Shopify Payments. They must have your name and address on a utility bill. What did documents did you submit? For the ID a government document is what's needed so a drivers license or passport should do the trick. You can see the Shopify help guide for more information on setting up Shopify Payments here.
If you'd like someone from our team to take a closer look into this for you on your store admin you can do so via live chat, email or callback. We’re not able to provide account-specific support via the Shopify Community at this time. To do this, please visit our support team here and log in to your account to create a support request. Once you are talking to a support advisor and verified your account they can assist you with this.