Unable to Start or Join a Meeting, The Meeting Client Hangs at 10%, 86% or 99%

Unable to start or join a meeting, the meeting client hangs at 10%, 86% or 99%.

Meeting hangs at 10%, 86% or 99% while trying to start or join a meeting.

The join process may hang if the meeting installer is not able to run properly.

Potential Causes:

SSL inspection may be enabled on your proxy or firewall settings
Anti-virus programs may be blocking the installation
ICAP Scanning is enabled

To fix the issue, try the following:

Create an exception rule for *.webex.com and atmgr.exe

For help with network configuration for Webex, see: WBX264 - How Do I Allow Webex Meetings Traffic on My Network?

Disable ICAP scanning and SSL Inspection

Webex meetings do not load when ICAP and SSL interception are enabled on a ProxySG appliance. The meeting client connection can not be intercepted due to the streaming nature of service.

Disable ICAP scanning for the Webex domain name and add the following to a CPL layer in your VPM or in your Local Policy:

<cache>

url.domain=//Webex.com/ response.icap_service(no)

To disable ICAP and SSL interception on a ProxySG appliance, see the following Symantec article: https://support.symantec.com/en_US/article.TECH246275.html

Uninstall / Reinstall Webex

Windows
Mac

For Windows users:

Uninstall Webex using the removal tool: Cisco Webex Removal Tool for Windows
Download and open the file.
Right-click on the CiscoWebexRemoveTool file and select Run as administrator.
Type Yes in the Command Prompt (CMD) window, then press Enter.
Try to join the meeting again.

For Mac users:

Uninstall Webex using the removal tool: Cisco Webex Removal Tool for Mac
Download the file.
Select Cisco_Webex_Meeting_Application_Uninstaller.dmg in your Downloads folder.
In the Cisco Webex Meeting Application Uninstaller window, double-click Cisco Webex Meeting Application Uninstaller.
Select Open to run the Cisco Webex Meeting Application Uninstaller.
If you are prompted to close one or more applications, close them, and then select Try Again.
Try to join the meeting again.

If the above steps do not resolve the issue, please try the following. You may need help from your IT department or computer help desk.

Try a new user profile:

Try logging on to your computer with a different or new user profile.
Try to join the meeting again.