HTTPS works but HTTP does not

Hey all,

hope you can help me out with this issue im having.
ive setup this plugin for http://www.marketingandnetworkinguniversity.com

my subdirectory blog is here: http://www.marketingandnetworkinguniversity.com/workwitharon/

Ive setup empowerurls.com to this subfolder.
check this out:

https://www.empowerurls.com/ – Works if you accept the security warning.
http://www.empowerurls.com/ – Directs to an error page.

We had ssl setup but disabled it to set this up correctly so it shouldnt be an issue at the moment.
Any thoughts or fixes on this?

Cheers,
Aron

https://wordpress.org/plugins/wordpress-mu-domain-mapping/