IDMPlanner Error

[may210297]

Hello, when I used the IDMPlanner to simulate the closed_loop_reactive scenarios, the warning will poped as " IDMPlanner could not find valid path to the target roadblock. Using longest route found instead".
I cannnot understand how this happened, and when the simulation ended. the metrics look not normal.

{ 'aggregator_type': 'weighted_average',
'corners_in_drivable_area': None,
'drivable_area_compliance': 0.003676470588235294,
'driving_direction_compliance': 0.6599264705882353,
'ego_is_comfortable': 0.0,
'ego_is_making_progress': 0.20955882352941177,
'ego_jerk': None,
'ego_lane_change': None,
'ego_lat_acceleration': None,
'ego_lon_acceleration': None,
'ego_lon_jerk': None,
'ego_progress_along_expert_route': 0.15519235267542777,
'ego_yaw_acceleration': None,
'ego_yaw_rate': None,
'log_name': None,
'no_ego_at_fault_collisions': 0.5827205882352942,
'num_scenarios': 272.0,
'planner_name': 'IDMPlanner',
'scenario': 'final_score',
'scenario_type': 'final_score',
'score': 0.0,
'speed_limit_compliance': 0.2311993937916828,
'time_to_collision_within_bound': 0.23529411764705882}