You put the Pre-Meshed Crack coordinate system in the wrong place and it is pointing in the wrong direction.
Put the origin of the Pre-Meshed Crack at the center of the two faces of the crack. Make the X axis point toward the crack tip, and the Y axis points in the direction of one of the crack faces.
You have a very coarse mesh that is inappropriate for Fracture calculations. The crack shown above is represented in the few elements at the center of the large thin-walled flat plate, between the two center ribs.