Flutter Web及普通Web App邮箱注册遇Auth Error code:47问题求助

• 依据Firebase官方示例，将Flutter Web应用及非Flutter开发的Web App迁移至Identity Platform
• 谷歌账号注册功能正常，但邮箱注册时触发503 HTTP错误
• Logs Explorer中仅记录无有效排查价值的"Error code:47"，新建项目测试仍复现该问题

捕获的错误日志 #

{  
  "insertId": "-6nlbdid1yva",  
  "jsonPayload": {    
    "status": {      
      "code": 13,      
      "message": "Error code: 47"    
    },    
    "methodName": "google.cloud.identitytoolkit.v1.AuthenticationService.SignUp",    
    "@type": "type.googleapis.com/google.cloud.identitytoolkit.logging.RequestLog",    
    "requestMetadata": {      
      "callerIp": "XXX.XXX.XXX.XXX",      
      "callerSuppliedUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36,gzip(gfe),gzip(gfe)"    
    },    
    "request": {      
      "@type": "type.googleapis.com/google.cloud.identitytoolkit.v1.SignUpRequest",      
      "email": "XXXXXXXX@XXXXX.com"    
    }  
  },  
  "resource": {    
    "type": "identitytoolkit_project",    
    "labels": {      
      "project_id": "my-project-id"    
    }  
  },  
  "timestamp": "2023-05-06T17:34:25.415Z",  
  "severity": "ERROR",  
  "logName": "projects/my-project-id/logs/identitytoolkit.googleapis.com%2Frequests",  
  "receiveTimestamp": "2023-05-06T17:34:26.070942970Z"
}

版本信息 #

Flutter 3.7.12 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 4d9e56e694 (3 weeks ago) • 2023-04-17 21:47:46 -0400
Engine • revision 1a65d409c7
Tools • Dart 2.19.6 • DevTools 2.20.1

environment:  
  sdk: '>=2.19.6 <3.0.0'  
  flutter: ">=3.0.0"

dependencies:  
  flutter:    
    sdk: flutter
#  Firebase dependencies  
  firebase_core: ^2.11.0  
  firebase_auth: ^4.5.0  
  cloud_firestore: ^4.6.0  
  firebase_storage: ^11.1.2  
  firebase_messaging: ^14.5.0
#  Auth  
  flutter_signin_button: ^2.0.0  
  google_sign_in: ^6.1.0

内容的提问来源于stack exchange，提问作者angelcervera