I use WhatsApp Web version 2.2310.5 which I downloaded from the web (which is why Modify option is blacked out). I can access it from settings, and view it from my Taskbar.
I used to get the option to make voice calls, but now I do not get the same option, nor can I receive voice calls.
I use an older version of WhatsApp since the I am more comfortable with the UI, and I can still select / forward / delete multiple messages at once (which I cannot do in the updated version of WhatsApp).
Recently, I encountered some problems with this older version, where it would restart every time my computer would go to sleep after inactivity. I managed to find a solution, which was changing the Compatibility of WhatsApp Web desktop application from Windows 8 to Windows Vista Service Pack 2.
This fixed all my problems, and Whatsapp Web worked well until I realised that I could not make or receive voice calls. I immediately changed it back to Windows 8 and restarted my PC, but the problem was not fixed.
I then ran a troubleshooter for Compatibility, it gives this.
What changes do I make to ensure that Whatsapp Web on Desktop runs properly, and that I can make and receive calls again?