I re-downloaded the below and it fized it for me.
Posts made by archyball
RE: my cast box with the several room i have chromecast disappeared only 1 remain and i can't do anything
I'm having the same issue. I'm using a Mac with OS High Sierra 10.13.5 using Chrome version 67.0.3396.99 (offial build) (64-bit). I just installed the download (while typing this out) and it fixed everything, thank you!!