Issue letsEncrypt SSL is not working

[mkmonirc]

Hello,

Suddenly letsencrypt automatic SSL is stopped working. It is showing the following error:

Could not issue an SSL/TLS certificate for <domain.com>
Details
Could not issue a Let's Encrypt SSL/TLS certificate for <domain.com>. Authorization for the domain failed.

Details
Invalid response from https://acme-v02.api.letsencrypt.org/acme/authz-v3/6184447534.

Details:

Type: urn:ietfarams:acme:error:connection

Status: 400

Detail: Fetching http://acme-challenge.localhost/.we...e/lntdgu1nguipc_dlsq9adxq7uaqn7iitknrfclzvwxa: Invalid hostname in redirect target, must end in IANA registered TLD

Anyone have the solution? I have re-installed letsencrypt and SSLIt. But issue not solved: Screenshot

 

[Bitpalast]

Please remove all redirects that are active on that website, for example the web hosting configuration redirect to a preferred domain (set it to "none"), but also redirects caused by rewrites in an .htaccess file of the website. Also make sure that the IPv6 configuration of the domain uses exactly the same names and targets like the IPv4 configuration so that this does not route to another site either.