Shadow Effect

ok so i know how to use the Drop Shadow effect but everytme i go back from camrea to drawing and click on the Drop shadow effect it says:
Toon Boom Studio V4.5.0 has encountered a problem and needs to close. We are sorry for the inconvenience.
if Anyone knows whats wrong or if it will just keep doing that please tell me.


This might have something to do with your hardware specs but in any case you might want to try to go to the top menu Edit>Preferences>Display tab and change the renderer from OpenGL to Direct3D. Then press ok and restart the application.