Using Previous Node Fields to get a file from HTTP

This forum is great for getting started, I have done more in a few days than I ever thought possible, so thank you all for the help.

I have ran into an issue where on an HTTP request it keeps saying my input is not a string and I cant get it to work, but If I take the value from the parameter its works fine. If you can shed some light where I went wrong please let me know

Can you please press and “Details” and see what it says there. Because I assume that the error does not originate from n8n but is rather the response of the API you are calling, which expects a parameter “url”

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