Fix CallingCommunicationError

✅ Solution

CallingCommunicationError in azure-key-vault often indicates a network connectivity problem or firewall rule blocking access between your application and the Key Vault service endpoint. Verify your network configuration allows outbound traffic to the Key Vault address and port (443), and that no firewalls or network security groups are interfering. Additionally, double-check your application's managed identity or service principal has sufficient permissions (Key Vault Secrets User or similar) to perform the requested operation.