I found out that in the Methods SharedEdge and GetPortal of the NavmeshTriangleNode-Class the NullPointer is occurung, the Member connections is null. I only have that when I use NavMeshCuts on my Graph and the enemies destroy an obstacle (which is a NavmeshCut). When I only tried to move the NavmeshCuts instead of destroying, the Exception got still thrown.
Could anybody help me? I dont get why a Node should have connections with null
Thank you for reporting this. I think this has already been fixed in a beta version. The connections member may be null if the node has no connections. Until the non-beta version with this fix is released you should be able to work around it by adding a check in the SharedEdge method to check for null.