I am using:
Sencha Architect

Channel: 4.2-stable
Platform: - win32 x64
Renderer: 56.0.2924.87
Framework: Ext JS 6.7.x Classic

And when I attempt to publish the app I am greeted by the screen (screen shot attachedCapture.PNG
The path in there is valid, and no matter what path I insert there is no way to proceed past this error. I can browse to a path, however the green publish button has no effect.

Any suggestions here would be very helpful,