Key vault: Unable to access Vault

Hi, I’ mhaving some troubles when trying to connect Doppler to Azure key vault (Service principal). I followed the steps from the docs exactly as described. I’m able to get trough the first step of linking Azure via the service principal but in the next step (when linking the Vault URI) i get this error: “Unable to access Vault. Please check your account access and try again.”

Does somebody know if the Doppler docs about this integration are outdated or is there something else i could be doing wrong?