API error

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{"error":{"type":"authentication_error","message":"No such API key.","code":"no_such_api_key"}}

I keep getting this error when i go to checkout on my site. I’ve already updated my API key on Coinbase multiple times and copied it and pasted it in the Coinbase commerce area in Shopify. I need help on this or else i can’t launch my site because customers won’t be able to checkout