Editing Troubleshooting of Google Vertex AI Search in Mandarin (section)

=== 疑難排解：Discovery Engine 中的「SearchLite API 被封鎖」錯誤 ===

'''問題描述'''：當嘗試使用 Google Vertex AI API 取得搜尋結果時<ref>[https://cloud.google.com/generative-ai-app-builder/docs/preview-search-results 取得搜尋結果 | Vertex AI Agent Builder | Google Cloud]</ref>，發生以下錯誤：

<pre>
curl -X POST -H "Content-Type: application/json" \
"https://discoveryengine.googleapis.com/v1/projects/PROJECT_ID/locations/global/collections/default_collection/engines/APP_ID/servingConfigs/default_search:searchLite?key=API_KEY" \
-d '{
"servingConfig": "projects/PROJECT_ID/locations/global/collections/default_collection/engines/APP_ID/servingConfigs/default_search",
"query": "QUERY",
}'
</pre>

遇到錯誤
<pre>
{
  "code" : 403,
  "message" : "Requests to this API discoveryengine.googleapis.com method google.cloud.discoveryengine.v1.SearchService.SearchLite are blocked.",
  "status" : "PERMISSION_DENIED",
  "details" : [
    {
      "@type" : "type.googleapis.com/google.rpc.ErrorInfo",
      "reason" : "API_KEY_SERVICE_BLOCKED",
      "domain" : "googleapis.com",
      "metadata" : {
        "service" : "discoveryengine.googleapis.com",
        "methodName" : "google.cloud.discoveryengine.v1.SearchService.SearchLite",
        "apiName" : "discoveryengine.googleapis.com",
        "consumer" : "projects/xxx"
      }
    },
    {
      "@type" : "type.googleapis.com/google.rpc.LocalizedMessage",
      "locale" : "en-US",
      "message" : "Requests to this API discoveryengine.googleapis.com method google.cloud.discoveryengine.v1.SearchService.SearchLite are blocked."
    }
  ]
}
</pre>

'''解決步驟'''：檢查 API 金鑰限制

* 確認金鑰是否限制特定 API：
*# 前往 Google Cloud Console 的 API 金鑰管理頁面。
*# 找到正在使用的 API 金鑰，並檢查是否限制特定 API。如果限制包含 discoveryengine.googleapis.com，請確保其設定正確。
*# 移除不必要的限制：如果金鑰被限制在不相關的 IP 位址或應用程式，請移除這些限制。
* 啟用 {{kbd | key=Discovery Engine API}}
*# 前往 Google Cloud Console 的 API 與服務頁面。
*# 搜尋 Discovery Engine API 並確保其已啟用。