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Been at this for days now and cannot seem to resolve this error.
I am trying to implement the Log in with PayPal initially in Sandbox, and running on my local machine (WAMP).
When I click the login button I get the error : This action isn't supported. Please return and report this error so that we can support it in the future. (invalid client_ID or redirect_uri)
I am using PHP, JAVA under WAMP
The login button is :
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