Since you just copy/pasted everything from the possible solutions linked to here:
[Stable Update] 2026-01-04 - Manjaro 26.0, Mesa, Firefox, LibreOffice, COSMIC - #2 by discobot
and the situation did not change,
I strongly suggest you revert the last action:
masking the polkit-agent-helper.socket
Do this by:
sudo rm /etc/systemd/system/polkit-agent-helper.socket
which will remove the symlink to /dev/null that was created by this action
As the explanation says:
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
As of now, you have done just that, with that command:
disabled this important component
for no good reason
and with no positive effect, without the (presumably) intended effect.
revert that
or it will permanently haunt you