A test authorization for mdttexas.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
2600:3c02::f03c:93ff:fe96:4d77: Fetching https://mdttexas.com/.well-known/acme-challenge/rIc7xxyOM1hgMNkqeOgvTHzzMQZQ_TqIIl997qy6LR0: Error getting validation data
mdttexas.com's webserver may be misconfigured.
Web server is serving the wrong protocol on the wrong port: Get "https://mdttexas.com/.well-known/acme-challenge/letsdebug-test": http: server gave HTTP response to HTTPS client. This may be due to a previous HTTP redirect rather than a webserver misconfiguration.
Trace:
@0ms: Making a request to http://mdttexas.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2600:3c02::f03c:93ff:fe96:4d77)
@0ms: Dialing 2600:3c02::f03c:93ff:fe96:4d77
@225ms: Server response: HTTP 301 Moved Permanently
@225ms: Received redirect to https://mdttexas.com/.well-known/acme-challenge/letsdebug-test
@225ms: Dialing 2600:3c02::f03c:93ff:fe96:4d77
@444ms: Experienced error: tls: first record does not look like a TLS handshake