Have them visit our Troubleshooting section
There are a few things that might cause this:
- They are using an outdated or non compatible browser. Make sure they are using Google Chrome or Firefox.
- They are using a mobile device like an iPad, tablet or phone. They need to be on a desktop or laptop.
- They are not logged in. If they registered, they'll need to login. Otherwise they'll need to enter as guests
- They are behind a firewall. They will have to open certain ports. Please visit or section on Firewalls.
If they continue to have issues, please have them email firstname.lastname@example.org