Install problem regarding pacui

[Yochanan]

@Katabasis

is there something else I can do to solve this problem?

Yes, read Announcements posts:

@philm

pacman and pacman-contrib changes

pacman-contrib is now split out from pacman. If you have anything installed that depends on pacman-contrib, update (after you finished the Release Update) with:

sudo pacman -Syu pacman-contrib