Invisible wall in Summit

Can't get onto this part of the roof even though it is possible to jump onto it from the window to the left.0_1535745219077_20180831155258_1.jpg

Stuck spot. You can jump out but it's still an annoyance to get stuck in here.

Could you maybe provide a bit more info or more zoomed out screenshot of where this location is? It's a bit hard to find right now. Thank you!