Bug#924964: remmina-plugin-nx: GtkSocket not available

[Giovanni Panozzo <giovanni@panozzo.it>]

I guess you are running remmina under Wayland. Wayland does not support 
GtkSocket, so some plugins can't work under wayland. If your system is 
running XWayland too, you can try to open a terminal and execute the 
following commands:

killall remmina

GDK_BACKEND=x11 remmina

Let us know: if this works, I will update the remmina FAQs.