If you getting error “Error Message: Seller short code is not specified and cannot be authorized.” during authorization, you need to update your seller ID at Lazada Open Platform. To do this:

1. Login to Lazada Seller center, and go to My account > profile, then copy the seller ID.
   
2. Next, go to Lazada open platform and login.
3. In the app list, click the “manage” of the app
   
4. In App management menu, click “Auth management menu”. Scroll down and click “Add”
   
5. Paste the Seller ID that you copy from Lazada Seller center and enter your Lazada seller center login, then click “Submit”