@mbridak Provided initial condition for root.

[mbridak]

    def lookup(self, call: str) -> dict:
        """
        Lookup a call on QRZ
        """
        logger.info("%s", call)
        root = {}  # <- This B The Fix
        if self.session:
            ...
            # Stuff follows
        return root.get("Callsign")

defined root, so now fails silently.