Sorry to necro this thread, but it seems like its not a server-side issue for me.
My server is running ESXi 5.5.0 (build 1331820).
I have a vSphere 5.5.0 (build 1281650) running on Windows 7 and also have installed vSphere Mobile Watchlist version 1.5.050000 (5293701) running on Android 7.0. Both work great. No issues (one is desktop one is mobile app).
Since the new Chromebook updates allow Play Store apps to be installed, I tried vSphere Mobile Watchlist version 1.5.050000 (5293701) [same as on mobile] running on Chrome OS version 63.0.3239.86 (Official Build) beta (64-bit) with Google Play Store version 8.3.74.U-all [0] [PR] 173689560.
This is what fails. All devices are on the same network and subnet with no intermediary firewalls. Both Android and Chrome OS versions are connected to the same wireless access point. I can log into the client using server credentials on all 3 clients. Can see activity and even "snapshots" of what the console is currently displaying. But the console fails to connect on the Chromebook.
It's not the end of the world, but it would be nice if there was a solution.