У вашего броузера проблема в совместимости с HTML5
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With the latest version of Ring Central being automatically installed in single user mode, this posed as a challenge to us system admins as we have multiple users using one PC. In this video, I demonstrated the procedure that is used to install Ring Central on the PC for all users using msiexec.exe. Please watch the video to the end to grasp a full understanding.
RingCentral: https://www.ringcentral.com/office/features/desktop-apps/overview.html
Commands:
msiexec.exe /i "C:\Apps\RingCentralPhone-10.2.1.msi" ALLUSERS=1 /qb /l* "C:\Apps\ringcentral.log"
(Please enter your custom path for your log file and installation file.)
/i - normal installation
AllUSERS=1 - Install for all users
/qb - basic ui
l - enable log
* - log all information, except for v and x options