I try to implement a LetsEncrypt V2 client using C#.
I follow all the steps and stages and i get an SSL certificate for 1 (one) domain, eg. test.ddns.net. The validation completes successfully using http-01 type.
I install this certificate on IIS (pfx file), using the C# BouncyCastle library.
When i try to load the website on chrome i get the error message: ERR_SSL_PROTOCOL_ERROR
When using Firefox i get: SEC_ERROR_BAD_SIGNATURE
The V2 certificates are not working?
If i use my client on V1 protocol everything works and the certificate created is valid.
What do i miss?