Audio is not working across ALL of my devices

[JillandDhana]

My audio was working just fine during a previous meeting. 

Then I began to host a new meeting, and audio did not work across ANY of my devices: Desktop, iPad and iPhone. 

I use an external mic for the Desktop, but even when switching native audio input on Desktop, iPad and iPhone, the meeting participants could not hear me (I could hear them fine). 

When I test the microphone in preferences on ALL devices, it shows that it is working. And yet, no audio for the participants. 

Zoom is updated on all my devices. I tried singing into a new meeting, and the same problem occurs. I signed into a meeting I was not the host of, and the same problem occurred. 

I can't image what the issue is here and hope someone can advise...