Please try the following steps to fix the webex issue.
1. Download WebEx uninstaller (https://help.webex.com/docs/DOC-2672#jive_content_id_WDL_InstallerUninstaller)
and install it.
2. Run the tool - "Meeting services removal tool" to remove
everything related to WebEx from the laptop/Desktop
3. Restart the laptop/PC.
4. Join/Re-join the session using the link received in the
email or Reinstall the WebEx by using the below mentioned link.
https://simplilearn.webex.com/mw3100/mywebex/default.do?siteurl=simplilearn
Select the "Support" option on the bottom left hand
side.
Select "Downloads"
Select the respective link for your operating system & download
the installer for your operating system
• Windows
• Mac OS X (for Intel Mac)
Helpline number to reach WebEx:
1-866-229-3239 (Toll free) for technical issues.
Intercallapac for audio conferencing issues
0008006105047 (Bharti Airtel)
0008006103244 (Others)
Operating System not supported:-
Windows: Win XP or below operating systems are not supported
IOS: 10.5 and previous are not supported