Plugable USB 3.0 Sharing Switch is not working - lights just flash, keyboard not recognized

The Plugable USB 3.0 Sharing Switch has been working fine since November 2016. I use it to switch a keyboard/mouse from a PC to a Surface Book Pro.

Currently the lights on the switch are flashing and the keyboard/mouse are not recognized.

Hardware
Standard gaming desktop PC
MS Surface Pro
Logitech G19 with power on and AZZA wired optical mouse plugged into usb port

Hello,

Thanks for contacting us! This behavior could be caused by a few different things. Please contact support@plugable.com and we’ll either get it working again, or send a replacement.

Thank you,
Jordan
Plugable Technologies