Unable to verify domain with html method

We have uploaded and deployed the file to our domain, but each time I try to verify it, I get an error “can not access the html file, please be sure the file uploaded correctly and retry”

We are trying to submit our application review by the deadline tomorrow and this is the last step to complete. Can someone help me with the manual verification method? And confirm the deadline might be extended in the meantime? Thank you!

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.