Cisco WebEx App w Big Sur

Hello Malati Shinazy.

Thank you for using Apple Support Communities. We want to make sure we're on the same page and understanding your issue correctly. That way we can do our best to help you out. To confirm, are you experiencing issues when using the Cisco WebEx app with your Mac? If so, what exactly is occurring? Is the app no longer responding?

Just in case, we do have a couple of helpful resources we'd like to share with you. Check out the links below:

If an app freezes or quits unexpectedly on Mac - Apple Support

If an app on your Mac stops responding, closes unexpectedly, or won’t open - Apple Support

Both contain steps that you can attempt for when facing issues with an app not responding or unexpectedly closing on you.

We hope this information is useful. Cheers.