Chrome version: 68.0.3431.0 (Official Build) dev (64-bit)
OS: Chrome

Repro steps:
1. Click on Termina Icon
2. Open Termina app (UI) and it doesn't show content into the window
3. 

Expected: Open Termina and show the vm screen.
Actual: Black window without content.
If I open vmc start, run_container.sh (lxb?) it works properly.

I can see this error in the JS Console:
crosh.js:73 Uncaught TypeError: Cannot read property 'spokenFeedback' of undefined

Uncaught TypeError: Cannot read property 'spokenFeedback' of undefined
    at hterm.Terminal.terminal.onTerminalReady (crosh.js:73)
    at hterm.Terminal.<anonymous> (nassh_deps.concat.js:11810)
    at hterm.Terminal.<anonymous> (nassh_deps.concat.js:12231)