Analytics GraphQL CORS issue

I’m using this example and I’m getting CORS issue. Is that tutorial missing some steps?

afaik has never responded with third-party-friendly CORS headers for security and anti-abuse reasons, maybe this tutorial is just ignorant and they were testing with cors disabled.

Did you solve this problem, I get the same error How can I fix it Help please

you can add cors headers to analytics API response using CF Worker, see this tutorial