Webinars rely on uninterrupted audio and video to deliver a smooth, engaging experience. If your microphone, speaker, or camera isn’t working as expected in Zoho Webinar, this guide will walk you through the most common browser and system-level issues and how to fix them quickly.

1. Track Start Error or Not Readable Error  

Why this happens:

• Another application or browser tab (especially in Firefox) is using your mic or camera.

• Audio/video devices may be disabled in your system's device manager.

• In macOS Mojave or later, permissions may not be granted at the OS level.

Solution:

• Close other apps or browser tabs that might be using the camera/mic.

• Use a different camera or microphone.

• Refresh the webinar page.

• Switch to phone audio if needed.

2. Camera not working in the latest Chrome version  

Why this happens:
An experimental Chrome feature called Media Foundation Video Capture might be causing compatibility issues with your webcam.

Steps to fix:

1. Open Chrome and go to:
   chrome://flags/#enable-media-foundation-video-capture
   
   

   

2. Set the dropdown to Disabled.

3. Relaunch the browser and retry your webinar.

3. Not Found Error / Devices Not Found Error  

Why this happens:

• Your system may not have any audio/video devices connected.

• The microphone or camera may be disabled or not recognized by your OS.

• The sound card may be missing or faulty.

Solution:

• Ensure all devices are connected properly.

• If devices are unavailable, use phone audio.

4. Over Constrained Error / Constraints Not Satisfied Error  

Why this happens:
Your camera or mic doesn't meet the resolution or hardware constraints required by the browser or webinar tool.

Solution:

• Switch to a different camera or mic.

• Use the Zoho Webinar desktop app.

• Use phone audio and join without video.

5. Not Allowed Error / Permission Denied Error / Invalid State  

These may also appear as:

• Permission Dismissed

• Media Device Failed to Shut Down

• Media Device Kill Switch

Why this happens:
Browser or OS permissions are blocking Zoho Webinar from accessing your mic or camera.

Solution:

• Check browser settings (Chrome, Firefox, Edge, Safari):

• Click the lock icon in the address bar and allow mic and camera access.

• On Safari:

• Go to site settings → Allow camera, microphone, and screen sharing.

• On macOS Mojave and later:

• Navigate to System Preferences > Security & Privacy > Privacy.

• Enable browser access for camera and microphone.

• Use the desktop app if browser access is restricted.

6. Track Ended Error  

Why this happens:
Your mic or camera was disconnected or permission was revoked during the session.

Solution:

• Reconnect your devices and refresh the page.

• Restart your browser or system.

• Use the desktop app or switch to phone audio.

7. Camera or Microphone Not Working Due to Extensions  

Why this happens:
Some browser extensions block WebRTC-based communication used in webinars.

Solution:

• Disable unnecessary extensions and refresh the browser.

• Try joining in Incognito Mode.

• Use phone audio or the desktop app.

• If the issue persists, contact support.

8. Abort Error  

Why this happens:
Even after allowing mic/camera access, your browser blocks the actual use of these devices.

Solution:

• Refresh the tab or restart your computer.

• Use phone audio.

• Use the Zoho Webinar desktop app.

• Contact Zoho Webinar support for assistance.