recaptcha problem

I am having an issue with a form on the website because of the recaptcha vs.3 is set to invisible and I get this error message when I submit the form (The captcha wasn’t entered correctly. Reset.) I don’t know how to set it up so I can see the recaptcha. I first set the form up with vs.2 of recaptcha with the “I’m not a robot” checkbox and that was working but I made the mistake of changing it to vs.3 which is invisible, now I’m stuck. How can I fix this?

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