Occasionally a black screen will occur after connecting to the Ignision server. (The connection field in the gutter (on the left) will become green when the connection is made. It will be yellow while the connection is in progress.) This black screen is simple to resolve. When a black screen occurs, disconnect by closing the tab and then connect again by pressing the play button on the gutter item. This should result in a functional display.
Please also follow the guidelines in Ignision SE usage guidelines and limitations.