This is a known AliExpress error - if you try to place the order manually without Dropified you will see you get the same error. You can try reaching out to the seller and to AliExpress.

To correct this you can delete the cookies off the AliExpress site itself. (different than cookies in Chrome)

Follow the instructions in this video.

https://www.loom.com/share/39ca23de7dce44f4846c062f0a75f4b9

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