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40003 Invalid App ID

API Error HTTP Code 40003

The `app_id` parameter in your request doesn't correspond to any registered application in the TikTok for Business developer portal.

What causes this error?

The app_id parameter in your request doesn’t correspond to any registered application in the TikTok for Business developer portal.

How to fix it

  1. Verify your app_id: Log into the TikTok for Business developer portal and confirm your app ID.
  2. Check environment: Make sure you’re not mixing sandbox and production app IDs.
  3. App status: Ensure the app hasn’t been deleted or suspended by TikTok.

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