Maybe this helps: I can't connect to my mqtt broker with the Nuki - #3 by Juergen.
In addition if you own a FritzBox7590AX you might run into this problem: FRITZbox 7590 ax issue with Wi-Fi smart lock 3.0 pro - #84 by Juergen
Maybe this helps: I can't connect to my mqtt broker with the Nuki - #3 by Juergen.
In addition if you own a FritzBox7590AX you might run into this problem: FRITZbox 7590 ax issue with Wi-Fi smart lock 3.0 pro - #84 by Juergen