Modern Guide to Thread on a Sonoff Zigbee 3.0 USB Dongle Plus V2

@raykholo have you by any chance faced the error "Thread network credentials does not match with any of the active thread networks around” when attempting to install the network key into an iPhone?

I can’t complete that part, and without that I can’t onboard devices onto the new network. I posted an ask for help here and here.

I would appreciate it if you could give me a hand!