我正在尝试使用以下代码设置基于订阅的付款
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top"> <input type="hidden" name="notify_url" value="https://example.com/subscribe/ipn"> <input type="hidden" name="custom" value=""> <input type="hidden" name="cmd" value="_s-xclick"> <input type="hidden" name="hosted_button_id" value="TY3URFFH8DYDN"> <input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!"> <img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1"></form>
一切正常,直到买家登录后。产生的错误:
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