Could you share with us (in the Sensitive Data section) the result of the Action “Get Status” for the URL you want to index?
If you are not able to do it, we could take a closer look at the settings. Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.
It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead: