Spróbuj z czymś takim:
every 1 second:
loop all players:
if {al.%loop-players%} is true:
if {al.c.%loop-players%} is greater than 0:
set action bar of loop-players to "&c&lPVP &7&l(&4%{al.c.%loop-players%}%&8:&4&k99&7&l)" <-Błąd
else:
send "&aSkonczyles walczyc." to loop-players
set action bar of loop-players to "&a&lKoniec Walki" <-Błąd