Happy to help on this. Can you kindly provide some more context on what the issue may be with your Facebook Commerce Account.
If at all possible could you share a full-screen screenshot of the error here so that I can take a closer look?
Are there any errors showing in your Shopify admin on the Facebook Channel, when you visit Online store > Facebook > settings? If so, please also share a screenshot of that too. In the meantime, you can have a look at their help center here for some answers to common questions.
Looking forward to your response.