Why am I getting an error message at checkout on my Dawn Theme store?

I have linked my store to PayFast. I am able to get to the checkout screen where credit card details are entered, enter the payment details and select process, but get an error on clicking checkout:

Failed to load the page

This page is not compatible with the editor due to one of the following issues:

Page is redirecing to an unsupported URL

Page failed to load due to an error

I have the options to View Documentation, or to Try again. If I click Try again, the Order Confirmation is returned correctly.

I am creating a store using the Dawn Theme.

Help please.

Hi @Poppie13 ,

I am Ani From https://www.task4store.com/ - Shopify Small & Custom Tasks Experts ( By MS Web Designer - Top Rated Shopify Certified Experts and eCommerce Consultant from Singapore )

I will love to help you with your concern.

-Kindly Provide your Store Url,
-Also Mention Which Shopify theme you are using

Note: If your store is protected with ‘store Font password’ please Send it here or DM me.

If you have any concerns feel free to ask me!

Regards,
Ani