Manufactorum still crashing in v0.5.1 (browser) if you haven't placed the ballistics workshop before.
ERROR in action number 1
of Step Event0 for object oGUI:
Unable to find instance for object index -4
at gml_Script_anon@240473@___struct___1212@initializeBuildings@BUILDINGS
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gml_Script_anon@240473@___struct___1212@initializeBuildings@BUILDINGS (line -1)
gml_Object_oGUI_Step_0