1. You need to first check for which country the missing value shipping error is showing. Accordingly, create and add the shipping service value in the shipping setting on which you are charging for that particular country. 𝗢𝗿,
  2. You may also sync shipping from the application using one click. Follow the below steps:Go to the Merchant Center section in Application → Settings →  Click on 𝗦𝘁𝗮𝗿𝘁 𝗦𝘆𝗻𝗰𝗶𝗻𝗴 under the Shipping section