It’s not just the widget. This page doesn’t list any events: https://www.bodyphd.com/events/event/ nor does your feed at https://www.bodyphd.com/feed/eo-events.
It would seem that something is ‘breaking’ the event query. This is unlikely to be a bug in Event Organiser given how prominent the bug is and that this appears to be an isolated incident. I’d recommend temporarily disabling any plug-ins you have – in particular, start with any which you have added recently.
I don’t believe anything has changed in the plug-in in recent versions that would cause this behaviour, so if you can determine what changes (i.e. plugins/themes added/updated) you’ve made since the calendar last worked that would narrow down the culprits.
If you do find a plug-in/theme conflict, please let me know and I’ll take a look.