if i copy the content of /etc/letsencrypt/archive/domain/privkey1.pem and /etc/letsencrypt/archive/domain/fullchain1.pem
in one file to /var/www/imscp/gui/data/certs/domain.pem the cert works fine!
but the plugin does not make a file /var/www/imscp/gui/data/certs/domain.pem after renew