Unable to verify domain via HTML even though the file is in the correct folder

Hey team, we are trying to verify our domain and have placed the verifyzoom.html file at the correct place and we can access it by going to the URL mydomain_DOT_io/zoomverify/verifyzoom.html

When we click “Validate” we get this error:
can not access the html file, please be sure the file uploaded correctly and retry

Can someone help us?

Hello,

Thank you for reaching out in relation to Our Domain Validation process, the next steps will be sent to you via DM. Please refer to our domain validation resource: Domain Validation Explanation for any further questions you may have about the process.

Thank you.