Can only connect when router when Wifi is OPEN but not with WPA-PSK enabled on router and selection in HA.
When I remove my wifi password in router thus making the network open HA connects. But when I go the the Network WLAN0 settings in HA and select wpa-psk it immediately show me this error: Failed to change network settings
D-Bus object /org/freedesktop/NetworkManager/ActiveConnection/16 is not usable, introspection is missing required properties interface
What HA installation are you using?
And why are you connecting it via wifi?
This is a bad idea for a server.
Connect it using wired Ethernet if this is in any way possible.
And which OS, if not HAOS.
HA 13.1 running on a Rasberry PI5 with built in wifi.
My setup is new the plan is slightly different. I agree local hard wired network is better.
I bought a SONOFF usb Zigbee gateway that will be plugged in directly into the Pasberry PI5 which is also the HA server. Then Zigbee sensors and swithces will connect to gateway via Zibee mesh.
The HA PI 5 will also connect directly to a Sunsync inverter via USB cable for local control.
Thus I tried to keep control direct to RPi5.
All above is in standalone storeroom right next to my house.
I do have some 3x wifi SONOFF swithces controlled via Ewelink with my Phone the controller. Not to critical.
The reason for wifi is that I dont have a copper ethernet cable between buildings. I have a wifi router in my house in a room right next to this bulding.
Pulling a cable will be a lot off effort which involve drilling throught brick wall and cable rack between the buildings. I will do it if needed. But wifi is just so much easier if I can get it to workā¦
Donāt put it in the storeroom then.
The 12kw Solar inverter with batteries will be installed there and I need local usb interface to HA.
What version of WPA-PSK are you using and with what encryption.
Today the typical setup would be WPA2-PSK with AES.
TKIP seems to be less and less supported and WPA1-PSK is often not supported.
WPA3-PSK is the future, but support is only for on newer devices are devices that have to hardware resources to be upgraded.
I am not sure what HA can and can not though.
I would always try to get Ethernet connection established, like maybe a Ethernet over powerline in this case.
I did tests using my phone as hotspot as well. WPA2/WPA3 on phone. Router only supports WPA2.
I think the issue is in HA because if I select the wpa option, type password and select connect. It emmediatly gives the error at the same instance its clicked.
How long is your passphrase?
It should be at least 8 characters long and special characters and spaces are sometimes cause for problems.
11 caracters with one special character. Let me try removing the special character.
To activate wlan, try this using add-on <Advance SSH & Web Terminal> and start it:
Check that wlan0 device is activated on
Sorry for my english 
I had the same problem as you and I solved it, temporarily, by going back to core 2024.9
Same or similar issue here.
When I try to connect to wlan I have the following error
D-Bus object /org/freedesktop/NetworkManager/ActiveConnection/27 is not usable, introspection is missing required properties interface
That 27 is changing every time I try to connect to some other value
Have you tried this?
To activate wlan, try this using add-on <Advance SSH & Web Terminal> and start it:
Check that wlan0 device is activated on
WPA (default TKIP) and WPA2 (with optional TKIP) are officially broken and the removal is advised from the WiFi-Alliance since 2015 (or 2012?) 
wpa_supplicant has plans to remove TKIP cipher by default - but consulting the changelog it seems to didnāt happen yetā¦ 
Maybe HA devs took care and build with the secure option CONFIG_NO_TKIP=y (TKIP removed) 
However, TKIP itself is no longer considered secure, and was deprecated in the 2012 revision of the 802.11 standard.
Hi thanks for the feedback. Had hectic week.
I will give it a try over the weekend.
Not working for me - āwlan0 adapter not foundā
Can you list your adapters?