I'm running chrome on ubuntu 16.04
Whatsapp web seems to have stopped working on the desktop.
The QR code flashes on the screen for what looks like 1 frame before disappearing to leave only the whatsapp logo.
In search, I have found answers suggesting socks proxy settings. When I go to settings->network->Network Proxy, the Method is set to None.
I also tired deleting all the PC sessions on my android device.
I have also tried killing all the chrome processes.
I have not tried rebooting yet.