Let's Debug

Test result for jekare.nl using http-01

A private, inaccessible, IANA/IETF-reserved IP address was found for jekare.nl. 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.

Submitted Jan 22 20:03:56 2019. Sat in queue for 3ms. Completed in 4s. Show verbose information.