The function to upload images for QMonitor uses Adobe's Flash technology.
Microsoft Edge disables Flash by default. To enable the Flash extension, go to the Advanced Settings section in Microsoft Edge and turn on the Use Adobe Flash Player option.
For more information, please see Adobe's article here: https://helpx.adobe.com/flash-player/kb/flash-player-issues-windows-10-edge.html
It is also recommended to run Windows Update to ensure you are using the very latest version of Microsoft Edge. Previous versions of the Edge browser have had issues with the Flash extension working properly.