I set up the vMix Call (HD version) shot correctly (I think) and am seeing a strange result.
The Caller laptop has connected using vmixcall.com in Chrome and the correct password.

However, the caller's screen shows 3 items...
1. The Chrome Reflect image of the caller's camera image in a small window box (which is correct).
2. Another small window box which also shows the same color bars - this should be showing the Main vMix Output - and is therefore also correct.
3. The color bars which are also showing in the vMix Call shot output - in their main screen ???

On my main vMix setup, for some reason, I only see colour bars in my Output when the Call shot is chosen.
This should actually be showing the caller's video camera image but all I see is color bars.

When I switch to another video camera shot in vMix, that image shows up in the caller's main window.
However, the small window which should show the caller what I see in my Output still shows color bars!!!

I don't know what I'm doing wrong but if someone could give me some advice I would be most grateful.

The color bars usually mean that the browser was not allowed to use the camera.