Works fine for me as well. Maybe try quitting and restarting Safari, logging out and back in to your account, or rebooting your computer.
If none of that helps, try creating a new account and accessing this Web site using Safari from the new account. If that works, something in your original account is to blame. Safari's preferences under your account in ~/Library/Preferences/com.apple.Safari.* might be causing the problem. You could quit Safari, move one of these files elsewhere, and restart Safari to determine whether the moved file is to blame. If the problem still exists, move the file back into ~/Library/Preferences and move the next com.apple.Safari.* away temporarily after quitting Safari, and so on.
2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE