Make sure that the login data has been completed.
Select the client (not the site), then click on Login Data. Fill in...
Wow. it was https:// I changed it to http:// and everything is working. You are an absolute genius!
Thanks so much!
I've re-created the SSL Cert using the following, and the issue still happens:
openssl genrsa -des3 -passout pass:yourpassword -out...
Does this help at all (I am a co-worker of Revert)
grep 81 /root/ispconfig/httpd/conf/httpd.conf
Separate names with a comma.