when it does it says this 

___________________________________________
############################################################################################
FATAL ERROR in Vertex Shader compilation
ShaderName: sh_outline

memory:67:22: error: syntax error, unexpected NEW_IDENTIFIER

at gml_Script_outline_start
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_outline_start (line -1)
gml_Object_obj_collection_node_Draw_0

please fix it because the game looks really cool. 

https://itch.io/t/442958/fatal-error-in-vertex-shader-compilation-solved

Try this.

still doesn't  work