Switch delivery failed issue

Hey everyone,

I have an automation that has been running smoothly for two months, but recently the light switch is failing to turn on/off.

I’m receiving an error notification when trying to change the state of the light switch.

Since I’m relatively new to this field, I have no idea what’s causing this or what I should do to fix it.

I am using HA OS and a ZB-Bridge (smlight slzb-06) with MQTT.
Core 2025.12.1
Supervisor 2025.12.2


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