TI-API: TI-API-0404 No API Endpoint Found

Part Number: TI-API

Tool/software:

Hello, 

As a prerequisite , We have s store API for TI Store API Suite, it's work! 

Now , we are developing Backlog Api , but it failed , we based on originally effective Authorization 

I create a get request  to  https//transact.ti.com/v2/backlog/orders/test 

but it response Code TI-API-0404  , Message No API Endpoint Found

Our account has set Backlog API and My TI display 100% 

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