Setup extention warnings

i installed uipathsetup by following BUILD AN AUTOMATION WITH STUDIOX module steps in the step 8: In StudioX, go to the Tools section and install the Excel AddIn . at this step i was not able to complete. when i click excel add-in i was getting a warning.
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after pressing ok there was another window
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on opening the link some thing are displayed


pls help to get the step 9.

Click Download button , wait for download to complete then double click on it.