Sandbox&Postman Error

I set up all things present in the guide for PostMan and Sandbox, read related Topics but i am still receiving this error when i try the List Vault Accounts function.

Here is the message:

Cannot GET /vault/accounts

Here is the first 5 caractere of my API Key: 2c684

Thanks for your suport.

I tried with and without v1 in the BaseURL but always an error

and for Python i have code : -7 error