Hey, I ran into the same problem, and that’s the way I earned it. First, you need to add the client id to the url. Therefore, in your case, change
uber://?action=setPickup&pickup=my_location&dropoff[formatted_address]=1455%20Market%20St%2C%20San%20Francisco%2C%20CA%2094103
to
uber://?client_id=YOUR_CLIENT_ID&action=setPickup&pickup=my_location&dropoff[formatted_address]=1455%20Market%20St%2C%20San%20Francisco%2C%20CA%2094103
where YOUR_CLIENT_ID is the customer identifier provided to you by Uber.
To get the client ID, you must register your application with Uber at https://developer.uber.com/ .
Hope this helps!
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