Let's Debug

Test result for localtest.me using http-01

ReservedAddress
Fatal
A private, inaccessible, IANA/IETF-reserved IP address was found for localtest.me. Let's Encrypt will always fail HTTP validation for any domain that is pointing to an address that is not routable on the internet. You should either remove this address and replace it with a public one or use the DNS validation method instead.
127.0.0.1
HTTPRecords
Debug
A and AAAA records found for this domain
localtest.me. 0 IN A 127.0.0.1
PublicSuffix
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for localtest.me is: me
StatusIO
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Apr 30 01:45:32 2018. Sat in queue for 3ms. Completed in 0s. Hide verbose information.