PayPal登录报错：Invalid return invalid client_id or redirect_uri求助

我几乎尝试了所有办法，已多次核对信息确保内容准确无误，但仍反复出现**"Invalid return invalid client_id or redirect_uri"**错误。怀疑问题出在PayPal端而非我方，求解决方法。

相关代码如下：

login.render ({
  "appid":"<My client id>",
  "authend":"sandbox",
  "scopes":"openid profile email address phone https://uri.paypal.com/services/paypalattributes",
  "containerid":"lippButton",
  "responseType":"code",
  "locale":"en-us",
  "buttonType":"LWP",
  "buttonShape":"pill",
  "buttonSize":"lg",
  "fullPage":"true",
  "returnurl":"https://easyclaimstore-dev.myshopify.com/admin/apps/64af2004495b12c144df08b8ebfc2a90/login"
});

报错截图：

内容的提问来源于stack exchange，提问作者Vibz91