you get an exception because you will not name objects on the map, this will throw an ArgumentException in TiledLib. So, to solve this problem, you need to go back to the Tiled program, (re) edit this map and select each object on the map and give it a name (not a property, but a name), and then export the map again and (re) import it into game content. This should fix the problem.
BTW: , .
: png ββ , , CollideLayer CollideLayer , , , CollideLayer . , .