Sometimes the message PayPal gateway has rejected request. Method Specified is not Supported appears when a customer attempts to place an order using PayPal. To fix it, set the value to “&” in a PHP script inside your Magento store or adjust php.ini.

You can set the value in a PHP script as follows:

To set the value in php.ini, use the following configuration:

Fixing PayPal gateway has rejected request: Method Specified is not Supported
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