Google Tag Manager CORS error

Hi, I’m using AMP for WP plugin, and I’m also getting this error since the last update I guess (I skipped a few versions since the last time I’ve updated).

Console log:
Access to fetch at 'https://www.googletagmanager.com/amp.json?id=%20GTM-NHSLHRS&__amp_source_origin=https%3A%2F%2Feducandoseubolso.blog.br' from origin 'https://educandoseubolso.blog.br' 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.

I can assure I’m using a Google Tag Manager container for AMP, following Google’s guidelines for this matter. Since the plugin update, Google Analytics is no longer showing pageviews for AMP pages, I’m assuming it’s because of this error.

What should I do?

Thanks!

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