Macbook Pro Chromecast no devices found

I have a fix

Fix - MacBook Pro, if using external VPN service like KeepSolid prior to launching Chrome or Edge, will show no devices found. But work around to not firing up VPN until *after* attempting to activate Chromecast, then when Chromecast devices before firing up VPN, the devices found will stay visible after launching Chrome or Edge.

BTW, this 'no devices found' glitch doesn't happen on WIN10 when external VPN is fired up prior to launching Edge or Chrome. Note that WIN10 machine is cabled into router, while OSX machine is on internal wireless connection (Nighthawk router). Haven't tried cabling OSX machine directly to router.