Domain Validation Issue with Ngrok Edge

I am having problems trying to validate my domain using Ngrok Edge. It seems that I can’t connect to the domain using SFTP to add the required folder and file for validation. Please let me know if there are any alternatives or if this has been resolved before. 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.