A test authorization for car.ms.gov.tl to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
DNS problem: query timed out looking up TXT for _acme-challenge.car.ms.gov.tl
Challenge update failures for car.ms.gov.tl in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/71535952
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: query timed out looking up TXT for _acme-challenge.car.ms.gov.tl