After many, many trials and errors with letsencrypt I managed to delete the letsencrypt certs for one site, then messed up my vhost. It seems letsencrypt now created a new certificate but no matter if I check/uncheck the letsencrypt box in the ISPCFG panel the vhost file stays the same. I mean there is no trace of anything HTTPS related in the vhost file although its timestamp changed every time I save the site#s configuration inside ISPCFG3. Any clues? I want ISPCFG3 to generate the vhost file WITH HTTPS - even if I remove the vhost file, then go to ISPCFG3 edit the site and save, the newly generated vhost file still has no https active even though ISPCFG3 show its checked for this site.