I’m sure that’s very frustrating.
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what firmware version is the station at? You may need to reboot it to get the most recent firmware. (Don’t reset the station, just power cycle it.)
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specific model of the bulb which isn’t working? Also, make sure it has the most recent nanoleaf firmware.
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do you have other matter devices successfully working with that station Hub?
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does your Wi-Fi support IPv6?
FAQ: What do I need to add a Matter device to the SmartThings app? Do I need a bridge router device?
Smartthings error messages aren’t usually very specific, but other community members have reported that error 39- problems with adding the nanoleaf matter Models were typically fixed by updating the firmware on both the hub and the lamp. Matter is a new and rapidly changing standard and it’s unfortunately a little too easy for things to get out of sync.