STEAM link Constantly Disconnecting from PC

When I first open the Steam Link app, it tells me my connection is super fast for streaming, but once I open a game, it gives me that red icon in the bottom right corner or will take me back to the Steam Link start up menu. I am constantly disconnected. I've checked that allllll the things are up to date I've hard reset the wifi router, PC and Logitech handheld, and I still disconnect constantly. I'm literally one floor up from my PC and this hasn't been an issue before (I've played this way for years). I'm so frustrated! Please help!