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.
fe80::250:7fff:fecb:eb0d
A and AAAA records found for this domain
jekare.nl. 0 IN A 82.72.7.247
jekare.nl. 0 IN AAAA fe80::250:7fff:fecb:eb0d
The IANA public suffix is the TLD of the Registered Domain
The TLD for jekare.nl is: nl
2 Certificates contributing to rate limits for this domain
Serial: 295639425035361696036818199345961766115059
NotBefore: 2019-01-19 13:33:46 +0000 UTC
Names: [jekare.nl www.jekare.nl]
Serial: 267735252707977557209374695564126196501468
NotBefore: 2019-01-19 12:37:09 +0000 UTC
Names: [jekare.nl www.jekare.nl]
The current status.io status for Let's Encrypt
Operational