Mam problem z sk na level

Błąd to znaczy co?
Na moje komendę w ogóle zmienić na to:
 

command /level [<text>] [<offlineplayer>]:
	trigger:
		set {_op} to offlineplayer-arg
		if arg 1 is not set:
			wait 2 ticks
			open chest with 1 rows named "&6Poziom %player%" to player
			wait 2 ticks
			format slot 1 of player with exp bottle named "&6Level" with lore "&7Poziom: &7%{wLevels::level::%player%}%" to close
			format slot 3 of player with stone named "&6Stone" with lore "&7Wykopany kamien (na tym poziomie): &7%{wLevels::stone::%player%}%/100" to close
			format slot 5 of player with stone named "&6Stone" with lore "&7Caly wykopany kamien: &7%{wLevels::stonecalosc::%player%}%" to close
			format slot 8 of player with diamond named "&6Wymiana" with lore "&71 level &c=> &710$" to close then run "level wymiana %player%"
		if arg 1 is "wymiana":
			wait 2 ticks
			open chest with 1 rows named "&6Wymiana" to {_op}
			wait 2 ticks
			format slot 0 of {_op} with Red Stained Glass Pane named "&4&lAnuluj!" to close
			format slot 1 of {_op} with Red Stained Glass Pane named "&4&lAnuluj!" to close
			format slot 2 of {_op} with Red Stained Glass Pane named "&4&lAnuluj!" to close
			format slot 4 of {_op} with exp bottle named "&6&l-1 level" to be unstealable
			format slot 6 of {_op} with Lime Stained Glass Pane named "&a&lAkceptuj!" to close then run "level wymianaakceptowana %{_op}%"
			format slot 7 of {_op} with Lime Stained Glass Pane named "&a&lAkceptuj!" to close then run "level wymianaakceptowana %{_op}%"
			format slot 8 of {_op} with Lime Stained Glass Pane named "&a&lAkceptuj!" to close then run "level wymianaakceptowana %{_op}%"
		if arg 1 is "wymianaakceptowana":
			send "&cWymieniono 1 level na 10$!" to {_op}