Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
According to that error message, i believe that the domain name (root domain actually) is on a restricted list for Let’s Encrypt.
Checking the history of this domain, you’ll see that no certificate from Let’s Encrypt is ever issued for the whole root domain.
In this case, are you the managers from the company? If so, please get in touch with one of the Let’s Encrypt staff members and submit a request for this domain. @lestaff If not, please ask a manager from that company to contact Let’s Encrypt in order to get the certificate for this domain.