powerline adapter

So I connected my gigabit router to a gigabit switch through powerline adapters, using cat6 wherever a cable was needed. That switch feeds my Nvidia Shield android box. I pay for 30 mbps internet. When I run ookla's speedtest on my Shield box... it says 29 mbps. I mean... Sure, it sounds...

Last night, my ethernet just entirely stopped working after disconnecting from TorGuard, and nothing has worked to fix it so far. Windows troubleshooter tells me "Ethernet does not have a valid IP configuration". I am almost always connected to TorGuard, and have encountered issues like this...