Black Screen when importing from library?

Hi all,
New at this.
Every time I import a background to the timeline, I get a black screen!

Please advise,

Is it vectorized image or bitmap?
In case you are using Windows and it is due to the display renderer tyoe that your video card supporting Direct3D, try changing the renderer serting from Preferences>Display tab from OpenGL to Direct3D and then restart Toon Boom Studio to apply changes.