Error "Start Video" for first participant

I’m getting an javascript error when clicking on the “Start Video” button and then the display goes all black. I believe it is only happening when you are the first participant in the meeting. I was able to reproduce using the sample-app.

Cannot read property ‘width’ of undefined.

Which version?
Latest version from and @zoomus/websdk 1.8.1

To Reproduce(If applicable)
Steps to reproduce the behavior:

  1. download and install sample-app-web
  2. ‘npm run start’ from ‘Local’ sub-directory
  3. Go to http://localhost:9999, enter meeting id (only change) and click “Join”
  4. Click on “Start Video” button (make sure you are the only participant in meeting)


Device (please complete the following information):

  • Device: Mac
  • OS: Catalina
  • Version: 10.15.7
  • Browser:Chrome

Hey @jc5826,

I was not able to reproduce this error. Can you share a video of it happening?


Yes. here’s a video

Note. Not sure if my being on a Mac/Chrome makes a difference. A colleague using Windows/Chrome was not able to reproduce problem.

Thanks @jc5826, we will get to the bottom of this issue and share an update. :slight_smile: (CS-2495)


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Hey @jc5826,

I have confirmed with our team that we are fixing this in the next version, 1.8.6.

We will post the release date here soon:


Hey @jc5826 ,

This should now be fixed. Please upgrade to version 1.8.6: