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After upgrading to Magento 2.3.1, I can't view order.
Each time I tried to view an order I get the error,

"Information Changes Have Been Made to this sections that have not been saved. This tab contains invalid data. Please resolve this before saving."

Screenshot here:

enter image description here

  • Could you please open the page source by clicking on CTRL + U you will find the exact error – Keyur Shah Apr 12 '19 at 10:15
  • @paul It would be grateful if my answer helps you then please mark my answer correct and upvote my answer so it helps other readers who is facing similar issue. Keep coding :) thanks – Muhammad Hasham Apr 16 '19 at 6:08
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Generally this issue occur due to Temando_Shipping module.

Disabling Temando_Shipping module fixed this issue. Probably something to due with existing data on a magento instance being upgraded.

I hope this will help

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