The following occured when I created a "file" and pressed spacebar past the beginning cutscene.

___________________________________________
############################################################################################
ERROR in
action number 1
of Create Event
for object room_generation: Background does not exist.
at gml_Script_create_tiles
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_create_tiles (line -1)
gml_Script_load_json_map
gml_Script_room_generate
gml_Script_room_create
gml_Object_room_generation_Create_0

After I pressed abort it said something about no NPCs being in the location despite having files in the root of C:

If it helps at all, my file's name was bram with a .png (leaf) extention.

Also, as to not confuse with my previously reported problem, this is on my more powerful machine.

Windows 10 (latest),

16 GB of ram, 3.40 GHz Intel i7 with a NVIDIA 1080