[Google Analytics +] Google API Project setup not working

I'm trying to set up Google Analytics + with my own Google API project and I keep getting the following error:
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400. That’s an error.

Error: redirect_uri_mismatch

The redirect URI in the request, https://bookingpages.io/, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit:
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How do I fix this?