A fatal issue occurred during the DNS lookup process for sgrdgw.gerp.work/A.
DNS response for sgrdgw.gerp.work/A did not have an acceptable response code: SERVFAIL
A fatal issue occurred during the DNS lookup process for sgrdgw.gerp.work/AAAA.
DNS response for sgrdgw.gerp.work/AAAA did not have an acceptable response code: SERVFAIL
A fatal issue occurred during the DNS lookup process for sgrdgw.gerp.work/CAA.
DNS response for sgrdgw.gerp.work/CAA did not have an acceptable response code: SERVFAIL
No valid A or AAAA records could be ultimately resolved for sgrdgw.gerp.work. This means that Let's Encrypt would not be able to connect to your domain to perform HTTP validation, since it would not know where to connect to.
No A or AAAA records found.