Airflow GCP Connection Issue With Kubernetes - Fernet key must be 32 url-safe base64-encoded bytes
Restart the worker and webserver.
Your worker and webserver are operating on the old fernet key. You changed the key in your config, so all your newly stored or modified Connections will use the new key, but the webserver/worker are still operating on the old key. They will never match and continue to give this error, till they're restarted.