Wifi on my Pi seems to not be working

I tried to use an hotspot addon, which returned this:

s6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service legacy-services: starting
s6-rc: info: service legacy-services successfully started
Starting Hass.io Access Point Addon
Warning: nmcli (1.44.2) and NetworkManager (1.40.18) versions don't match. Restarting NetworkManager is advised.
rfkill: Cannot open RFKILL control device
Failed to set beacon parameters
wlan0: Could not connect to kernel driver
Interface initialization failed
wlan0: interface state UNINITIALIZED->DISABLED
wlan0: AP-DISABLED 
wlan0: Unable to setup interface.
wlan0: interface state DISABLED->DISABLED
wlan0: AP-DISABLED 
wlan0: CTRL-EVENT-TERMINATING 
hostapd_free_hapd_data: Interface wlan0 wasn't started
nl80211: deinit ifname=wlan0 disabled_11b_rates=0
s6-rc: info: service legacy-services: stopping
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped

Homeassistant says this when trying to setup WiFi:

Failed to scan for accesspoints,
Unknown error, see supervisor logs

The logs state the following:

Logger: homeassistant.components.hassio
Source: components/hassio/websocket_api.py:138
Integration: Home Assistant Supervisor (documentation, issues)
First occurred: 18:32:43 (5 occurrences)
Last logged: 18:39:14

Failed to to call /network/interface/wlan0/accesspoints -
Failed to to call /network/interface/wlan0/update -

(Edit: Why does it say “failed to to call”??)
Can anybody help me?

When you are asking support about a random custom addon, the least you could do is to specify which :wink:
Then, maybe ask for support on the support thread for the addon (if that exists) or to the developer.

Also, are you using HAOS or Supervised?