Application authentication doesn't work for me

WizzzOzzz 1 Reputation point
2021-08-28T12:01:11.307+00:00

I have register my application to the azure App Registration service, to Authenticate API request from my FE app to my BE app.
according to this tutorial
these are the screenshots of the BE configuration:
127301-image.png
127292-image.png

and these are the screenshots for the FE configuration:
127283-image.png
127170-image.png

for some reason it doesn't matters how I run it (Postman, Code) it gives me 401.
can someone please assist me?

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