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Magento 2 ups is not working with REST SERVICE option

I am using the UPS shipping method and I am getting shipping rates with the below option.

  • United Parcel Service XML

But as I change it to

  • United Parcel Service REST

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then it stopped working and sending the below response.

Response:

{
“response”:{
“errors”:[
{
“code”:”250002″,
“message”:”Invalid Authentication Information.”
}
]
}
}

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