Category selections not appearing in Edit Event

The Event Category selection box is displaying incorrectly and not showing any of my categories for me to select when I am adding a new event, or editing an old one. Because of this, I cannot create a new event, as selecting an event is required. All I have displayed is a small empty box. I have tried on multiple browsers and have gotten similar results.

Are there any solutions out there for this issue?

Hi

This issue has not happened with any one before, so I am not sure. have you published the categories ? Maybe you can submit a support ticket sending us admin account of your site so that we can check it for you.

Regards,

Tuan