Error suddenly occured ? Help please !

[Khyrpa]

I'm really not sure, but your error shows someting's wrong with your map file.

ERROR: Could not open binary file 'C:/Vrbiz/Amnesia The Dark Descent/Amnesia/custom_stories/Keep Progress/maps/ch01/KeepProgress2.map_cache'
ERROR: Could not map cache file 'C:/Vrbiz/Amnesia The Dark Descent/Amnesia/custom_stories/Keep Progress/maps/ch01/KeepProgress2.map'. MeshEntity Loading: 684 ms
ERROR: CreatePlane failed: plane corners are not coplanar. Plane name: Plane

try removing your map cache and also there is some weird Plane that is not coplanar? whats coplanar?
http://www.mathopenref.com/coplanar.html

I have no idea about the mesh entity loading thing...