The box has gone offline
Your guests are still online. Check power, then the cable.
First, the important part: if the box loses power your guests are not cut off. They stop seeing your page and stop being captured, but the internet carries on.
Check the power light. Cleaners and contractors unplug things more often than anything else.
Check the cable from your router is seated at both ends.
Give it two minutes after power comes back. It has to reconnect before it reports in.
Your dashboard shows when the box last checked in. If it has been more than fifteen minutes and the power is definitely on, email hello@margovy.com and we will look from our end.
More in the box
If this did not solve it
Email hello@margovy.com. Tell us the venue name and what you were doing when it went wrong, and a person will reply.