我在移动应用中实现了paypal集成。我正在使用Rest API。它在一个月之前工作正常，但突然停止使用以下错误消息： 目前似乎没有工作。请稍后再试。 我尝试使用沙箱凭据登录时收到此错误。
这是我的JSON：
{
"intent":"sale",
"redirect_urls":{
"return_url":"https://www.google.com/",
"cancel_url":"https://www.google.com/"
},
"payer":{
"payment_method":"paypal",
"payer_info":null
},
"transactions":[
{
"amount":{
"total":"45.9",
"currency":"AUD",
"details":{
"subtotal":"45.9",
"tax":"0",
"shipping":"0"
}
},
"item_list":{
"items":[
{
"quantity":"1",
"name":"Stainless Braided Hose Black",
"price":"45.9",
"currency":"AUD",
"description":"Description not available",
"tax":"0"
}
],
"shipping_address":{
"recipient_name":"Harry p",
"line1":"104, pavan",
"line2":"Shahibaug",
"city":"Ahm",
"country_code":"AU",
"postal_code":"124536",
"phone":"252253656",
"state":"Guj"
}
},
"description":null
}
]
}