I wrenched my file to get out of that folder room. Tried a different doorway and it led me to a grassy outdoors place that worked fine. However the next doorway I tried inside that one (from level 2 to level 3) crashed me with the same shader issue. Perhaps it's just certain themes/backgrounds?
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FATAL ERROR in Vertex Shader compilation
ShaderName: shd_clip_rect
D3DXCompile failed - result
at gml_Object_obj_clip_rect_shd_Draw_0
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stack frame is
gml_Object_obj_clip_rect_shd_Draw_0 (line -1)