Sorry, i can´t grant Access to this Server for security reason, even if you are an Developer of software we use.
But maybe you took me in the right direction.
In the past i used manually generated certificates, that stored under /etc/letsencrypt.
IMSCP uses symlinks in /etc/imscp who points to one file with Cert, Chain and Key in the live subdirectory.
Maybe this is the reason the Script cannot decode the cert?!
Can you give me an hint how to install new, from the Plugin generated, Certs?
Thanks a lot!
IMSCP is 1.5.1
Letsencrypt is 3.3.0
On Ubuntu Trusty