recaptcha ERROR for site owner: Invalid key type

I have copy and pasted the two keys into the plugin but I keep getting the error recaptcha ERROR for site owner: Invalid key type. I have checked and copy and pasted the key numerous times. I’ve double checked the website the key is registered against too.

I’m hoping someone can help as I’ve woken up this morning to hundreds or failed orders (unsure of what impact that might have to my site), but I need ton try to sort it out.

Thanks for any responses

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