I am getting the following error when I run the syncconstantcontact.v3.php script.: error_description":"refresh_token parameter is required for grant_type=refresh_token","error":"invalid_request It appears there is an issue with the code in getaccesstoken.v3.php since I am getting the following error: "error_description":"Authorization code is invalid or expired.","error":"invalid_grant" How do I solve the issue with the expired Authorization code? Running the first code above should sync contacts in my database with constant contact but that is not working now.
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