Google tag manage not loading, Console errors

Please see the link I shared for a page I have that is AMP enabled, I am using Google site kit to load analytics and GTM. Google tag manager is failing to load though. Please also see console errors with regards to Google tag manager

Console error below:
“Access to fetch at ‘https://www.googletagmanager.com/amp.json?id=GTM-*******&__amp_source_origin=https%3A%2F%2F*************.co.za’ from origin ‘https://*********.co.za’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.”

The page I need help with: [log in to see the link]