After recent upgrade to manjaro-system (20210612-1 → 20220202-1).
User is not in the sudoers file. This incident will be reported.
Fix: Uncomment these two lines
## Uncomment to allow members of group wheel to execute any command
%wheel ALL=(ALL:ALL) ALL
## Uncomment to allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL