Lets-encrypt problem

Good morning, following this guide https://github.com/frappe/erpnext/wiki/Setting-up-TLS-SSL-certificates-Let’s-Encrypt-for-ERPNext-sites i did theese things

  1. enabled multitenant dns
  2. moved the site1.local to mydomain
  3. changed the configuration
  4. changed the nginx configuration from site1.local to mydomin

now when i execute sudo bench let-sencrypt mydomain i have the following error

Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.

can anyone help me?

Thank you

This is an error message from the Let’s Encrypt tool itself. It’s likely to be related to the make up of your website. I would Google this error and see what you need to change to allow Let’s Encrypt to authenticate your site and allow a SSL cert to be created