I cant get my fondant not to crack. What am I doing wrong?

Usually it means that you need to add some shortening, too dry. Or it could me that you're rolling it too thin.

DianaJJ

What fondant do you use? Helps us to help you, but if it's home made, the recipe might need adjusted.
How do you roll it out - ps could be drying it out, so try trex.
Do you knead it properly?
How long is it out for - if it sits uncovered or u spend too long rolling and re-rolling it, it will dry out.
When does it crack? Affects what the cause night be. If it's when you move the cake, you probably need a thicker base.
xx