NullPointerException goal is null

[deschcla]

Hello, I have a NullPointerException with my problem and my domain which seems to me correct. The error is : java.lang.NullPointerException: Cannot invoke "fr.uga.pddl4j.problem.operator.Condition.cardinality()" because the return value of "fr.uga.pddl4j.heuristics.state.AbstractStateHeuristic.getGoal()" is null However I have a goal in my problem file.

Here the pddl files : domain.pddl.txt p01.pddl.txt