Twinkly script

[admin]

The challenge = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\a" part seems incorrect, try the one from the docs:
{challenge = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8="}

You can also try MQTT instead of HTTP, the integration seems easier for MQTT.