添加完分账接收方，然后请求单次分账的接口，为什么只返回false，没有一点其他的信息

接口地址：https://api.mch.weixin.qq.com/secapi/pay/profitsharing

请求参数：

string(561) "<xml><appid><![CDATA[wx3ae51844ed9d318c]]></appid><transaction_id><![CDATA[4200000742202011247423371524]]></transaction_id><mch_id><![CDATA[1596211881]]></mch_id><nonce_str><![CDATA[ibuaiVcKdpRxkhJA]]></nonce_str><out_order_no><![CDATA[fz2020112413562785628500]]></out_order_no><receivers><![CDATA[{"type":"PERSONAL_OPENID","account":"o8u_gvwQwwqof9DZzaA6DhTqAoM8","amount":1,"description":"\u5206\u5230\u4e2a\u4eba"}]]></receivers><sign_type><![CDATA[HMAC-SHA256]]></sign_type><sign>2B7D85DC4AB9A106C41A332A788F9C17ABEF57A67302D7FBB1D466DDDC87DD19</sign></xml>"

返回如图