When Joining meetings via the web interface with Pexip, it is a simple and quick way to use the product. Although when doing this on a company machine you could run into the issue of group policy blocking.
This is when there are certain settings that are controlled by system administrators. These include downloading and installing software or accessing certain settings. This can hinder the use of Pexip in browser because you need to be able to enable the camera and microphone.
If you want to use the screen sharing plugin that needs to be downloaded and added to chrome also.
The best would be to forward the request to the OS administrators service desk asking for assistance in browser extension installation, as in such case the add-ins for Pexip have to be whitelisted.