Hi Michael,
Welcome to the community.
You get a 401 from the Key Vault in your screenshot.
401 means that the request is unauthenticated for Key Vault.
A request is authenticated if:
- The key vault knows the identity of the caller; and
- The caller is allowed to try to access Key Vault resources.
source: https://learn.microsoft.com/en-us/azure/key-vault/general/rest-error-codes
The function then times out after 5 minutes, which is expected behavior:
source : https://learn.microsoft.com/en-us/azure/azure-functions/functions-scale#timeout
Check the Key Vault logs as well as the function code to further diagnose.