Hii,
I encountered some issues with the Webex desktop application; therefore, I used Revo Uninstaller, followed by the Webex removal tool (available at the link below), to eliminate any remaining traces of the software, which allowed for a fresh installation:
Please note that you must have administrator privileges on your computer.
Although this is not a Microsoft website, it is the official Webex site.
Please consider rating this question (by accepting the answer or providing other feedback) and visiting the Microsoft Q&A community if you have any further questions.
Thanks