Fix error with image editor toolsystem when switching to some workspaces.

release/scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -1394,7 +1394,10 @@ class IMAGE_PT_tools_active(ToolSelectPanelHelper, Panel):
     @classmethod
     def tools_from_context(cls, context, mode=None):
         if mode is None:
-            mode = context.space_data.mode
+            if context.space_data is None:
+                mode = context.space_data.mode
+            else:
+                mode = 'VIEW'
         for tools in (cls._tools[None], cls._tools.get(mode, ())):
             for item in tools:
                 if not (type(item) is ToolDef) and callable(item):