The following is from Known issues and solutions in the most recent Stable Update notification threads; there are a few solutions listed that may help:
problems with polkit
After a change in polkit, some users report permission problems. Different solutions are suggested:
rebooting
reinstalling polkit (with sudo pacman -S polkit, since pamac may not work in that case)
fixing the suid permissions manually with
sudo chmod 4755 /usr/lib/polkit-1/polkit-agent-helper-1
fixing the file permissions manually
The proper permissions are:
drwxr-xr-x (755) - root:root - Directory
-rwxr-xr-x (755) - root:root - Executables
-rw-r--r-- (644) - root:root - Rules files
so to fix you use
sudo chown -R root:root /usr/lib/polkit-1/
sudo chmod 755 /usr/lib/polkit-1/
sudo chmod 755 /usr/lib/polkit-1/polkitd /usr/lib/polkit-1/polkit-agent-helper-1
sudo chmod 644 /usr/lib/polkit-1/rules.d/*
Alternatively, running the full Manjaro packages update via pacman and rebooting before updating the AUR packages withpamac might circumvent the problem from occurring in the first place.
Some users report success with masking the helper service. Please use this as a temporary or last resort solution if everything else fails as this disables an important component and cannot be officially recommended:
sudo systemctl stop polkit-agent-helper.socket
sudo systemctl mask polkit-agent-helper.socket
Another solution for the Polkit issue is to switch Kernel to version 6.6 or above if all the above does not help.
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