Windows 7 reached End Of Support from Microsoft on January 14, 2020. - https://www.microsoft.com/en-us/windows/windows-7-end-of-life-support-information
Due to this, running the Pexip (MyMeetingVideo) application on Windows 7 Operating Systems is no longer considered a supported system and support for the Pexip app on Windows will only be considered best-effort support.
It has been reported that Pexip application v3.0.9 and newer will not work on Windows 7. The recommended workaround is to install a legacy version of the Pexip (MyMeetingVideo) application (v3.0.8 found here).
If the user is unable to install the application on the machine, then please direct the user to utilize a browser-based WebRTC client such as Chrome.