Staging & Sand Box API error

**CURRENTLY TRYING: **

I am trying to get some results of rates API but I am always getting the below response.

resulted in a 400 Bad Request
response:{
"status":"failure",
"errors":["Sorry, we couldn't find any shipping solutions based on the information provided."],
}

I tried to call this API from Postman collection.

Based on this response I have to call shipment APIs but because of this, I am stuck.

However, it's working in production mode but I can not use that during the development.

**ERROR RECENTLY RECEIVED:**

Error 403: org_internal
This client is restricted to users within its organization.
Request Details
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