fix for changes in blender.

space_view3d_panel_measure.py

@@ -654,7 +654,7 @@ class VIEW3D_PT_measure(bpy.types.Panel):
     bl_space_type = 'VIEW_3D'
     bl_region_type = 'UI'
     bl_label = "Measure"
-    bl_default_closed = True
+    bl_options = {'DEFAULT_CLOSED'}
 
     @classmethod
     def poll(cls, context):