A test authorization for www.accounts.nylex.pro to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://www.accounts.nylex.pro/.well-known/acme-challenge/LAEw0JLhrWEjSBDsVAKtTg0sRbVqsdaGTcLr75CmvWo: Timeout during connect (likely firewall problem)