I try to summarize your support request.
You recently installed Nuki Direct v3.0.6.
Since the first time you installed it, you experienced occasional disconnections of Homey from Nuki Bridge (red exclamation mark for each Nuki device in Homey app for smartphone). The red exclamation mark does not provide any diagnostic information therefore you performed a pairing operation. The pairing operation briefly (< 1 sec) showed a picture of a globe, then it briefly (<1 sec) showed a picture of a Nuki Bridge and, finally, an ECONNREFUSED error message.
Thereafter Nuki Direct remains permanently in this disconnected state. The only way for connecting it again to Nuki Bridge is to restart your router/access point.
Well, my suggestion is to check the configuration of your router/WiFI access point (TP-Link?) which, from time to time, refuses the connection of Homey to Nuki Bridge.
Hope this helps. Anyway, I kindly ask you to send any further messages related to this problem privately. Thank you!