Another API Error

I searched but couldn’t find any results that would actually work for me, but I’m having what seems like a common issue with Mail Chimp API and this plugin. Yesterday I created a brand-new Mail Chimp account, Generated an API, Copied it into the Plugin, and get an error connecting. I disabled all plugins except MC4WP, but nothing changed, I contacted our webhost to make sure Curl and everything was up to date, I made sure the MC4WP was up to date, I tried a new API, I deleted the Plugin and reinstalled it, nothing seems to work, the error I get is:
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Mailchimp returned the following error:
Unauthorized. API Key Invalid. Your API key may be invalid, or you've attempted to access the wrong datacenter.

Request:
GET https://us14.api.mailchimp.com/3.0/?fields=account_id

Response:
401 Unauthorized
{"type":"https://mailchimp.com/developer/marketing/docs/errors/","title":"API Key Invalid","status":401,"detail":"Your API key may be invalid, or you've attempted to access the wrong datacenter.","instance":"d472aaed-dfe4-502e-4efd-370fb296e4a0"}

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I also added the API Key to a test URL I found on another support thread that returned this error:
{“type”:”https://mailchimp.com/developer/marketing/docs/errors/”,”title”:”Forbidden”,”status”:403,”detail”:”The API key provided is linked to datacenter ‘us14′”,”instance”:”665ec9ef-a125-72b4-eb1c-adbe8f2c5a16″}
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Thank you for any assistance you can provide

Dave

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