GAS エラー「Exception: You do not have permission to call UrlFetchApp.fetch. Required permissions: https://www.googleapis.com/auth/script.external_request」が発生した場合の対処法

const postGoogleChat = (message) => {
  
  let webhookUrl = "https://chat.googleapis.com/v1/spaces/xxxxx";
 
  message = {
    'text': message
  };
  
  let options = {
    'payload': JSON.stringify(message),
    'myamethod': 'POST',
    'contentType': 'application/json'
  };
  
  let response = UrlFetchApp.fetch(webhookUrl, options);
}

エラー	
Exception: You do not have permission to call UrlFetchApp.fetch. Required permissions: https://www.googleapis.com/auth/script.external_request

 "oauthScopes": [
    "https://www.googleapis.com/auth/script.external_request",
    "https://www.googleapis.com/auth/contacts",
    ...,
    ...,
    ...
  ],