Hi Dark_Aria, 

The OPs problem here was resolved and confirmed resolved by the OP. 
Can you spin up a new post with details specific to your environment so we can better help you?
Please include the following:

Tenant settings for service principals accessing APIs
Screenshots of the workspace membership
If using a workspace identity, a screenshot of the workspace identity page

Feel free to tag me in this new post and I can help you out the best I can.

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