Check your permissions in Google Chrome:
4. In the "Media" section, find Camera and select
find Microphone and select it.
If Zillable is in the Block section, unblock by deleting Zillable from Block section.
Check your permissions in Firefox:
1. Click the camera icon on the left side of the browser URL bar, this should show you whether the browser has access to your camera or microphone:
2. Change the dropdown menu to "Allow" or "Always allow" to give permission:
3. To identify the Microphone and Camera is enabled this icon will be shown at the center top of the screen