Could someone please share contents of first 20 lines of 000-ispconfig.vhost file? /etc/apache2/sites-enabled/000-ispconfig.vhost
I guess you have problems with your ispconfig.vhost? The safest way to fix is to force update ispconfig, reconfiguring all services, select ssl to be safe; that will automatically reset (thus fix) your ispconfig.vhost without a need for samples from others.
@ahrasis thank you. As soon as I posted, I found a backup of the file and was able to fix couple of lines i fat fingered while updating to 3.2.6. I didn't have option to delete post #1 on this forum.