Error when subscribing

Hello, good afternoon:

I am getting in touch with you so that you can try to solve a problem that appears when people try to subscribe through the form that your plugin offers me. I have two problems, the first is that people cannot subscribe to my Mailchimp account, I get the error: ” Wow, something has gone wrong, try again later. ”, The second problem is that before That error appeared, everyone who subscribed from that form, did not become part of the list of emails that I have added in Mailchimp (although I have the API and other components well configured).
Thank you very much.

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