TWD Retribution ending Help!

After the storm breaks and a bunch of zombies raid the buss. when i then travel to the tower to do the Bell TOLL FOR NOLA ( end mission) i always spawn on the other side of the map.and i cant go around it because a bunch of cars block it. I cant go trough it since theres fences that blocks it. I have tried everything, relode the saves. close the game and open it.- nothing works i always spawn on the other side of the map under a bridge, next to the big parking garage and infront of the gate.I also cant go back to the buss since the boat does not have the map required to leave.

After the storm breaks and a bunch of zombies raid the buss. when i then travel to the tower to do the Bell TOLL FOR NOLA ( end mission) i always spawn on the other side of the map.and i cant go around it because a bunch of cars block it. I cant go trough it since theres fences that blocks it. I have tried everything, relode the saves. close the game and open it.- nothing works i always spawn on the other side of the map under a bridge, next to the big parking garage and infront of the gate.I also cant go back to the buss since the boat does not have the map required to leave.