You mean here: https://apps.safenetwork.org/n99/ ?
The website link is http://network99.io/ but it seems to redirect to https://www.network99.io/ (which is broken as you said). So maybe it could be configured to redirect to https://network99.io/ instead?
I’ve updated the website link to https://network99.io/, so it should work fine now 
I’ve also updated the first post of the n99 topic, because the website links were broken there as well.