Try now. Just pushed an update. If it still won't load, you might have port 444 blocked in your firewall. That's the port Nostrgram's web socket server is using now. Firewalls don't block it by default, but if you're using a more locked-down setup it might.
Discussion
fyi - seeing some of the same delays today.
Logging in through alby. It usually takes 20-30 seconds for the page to show up. My profile page doesn't always change from the login key but I do see following/following +.