Problem z gui/menu.

Witam. Mam problem z stworzeniem komendy /ulepszenia.                                            Errory z konsoli: http://imgur.com/a/J3eW5

To jest kod:

command /ulepszenia:
    trigger:
        open chest with 6 rows named "Ulepszenia" to player
        wait 2 ticks
        format slot 1 of player with 1 of stained glass pane:8 named ""
        format slot 2 of player with 1 of stained glass pane:8 named ""
        format slot 3 of player with 1 of stained glass pane:8 named ""
        format slot 4 of player with 1 of stained glass pane:8 named ""
        format slot 5 of player with 1 of stained glass pane:8 named ""
        format slot 6 of player with 1 of stained glass pane:8 named ""
        format slot 7 of player with 1 of stained glass pane:8 named ""
        format slot 8 of player with 1 of stained glass pane:8 named ""
        format slot 9 of player with 1 of stained glass pane:8 named ""
        format slot 10 of player with 1 of stained glass pane:8 named ""
        format slot 11 of player with 1 of stained glass pane:8 named ""
        format slot 12 of player with 1 of stained glass pane:8 named ""
        format slot 13 of player with 1 of stained glass pane:8 named ""
        format slot 14 of player with 1 of stained glass pane:8 named ""
        format slot 15 of player with 1 of stained glass pane:8 named ""
        format slot 16 of player with 1 of stained glass pane:8 named ""
        format slot 17 of player with 1 of stained glass pane:8 named ""
        format slot 18 of player with 1 of stained glass pane:8 named ""
        format slot 19 of player with 1 of stained glass pane:8 named ""
        format slot 20 of player with 1 of stained glass pane:8 named ""
        format slot 21 of player with 1 of stained glass pane:8 named ""
        format slot 22 of player with 1 of stained glass pane:8 named ""
        format slot 23 of player with 1 of stained glass pane:8 named ""
        format slot 24 of player with 1 of stained glass pane:8 named ""
        format slot 25 of player with 1 of stained glass pane:8 named ""
        format slot 26 of player with 1 of stained glass pane:8 named ""
        format slot 27 of player with 1 of stained glass pane:8 named ""
        format slot 28 of player with 1 of stained glass pane:8 named ""
        format slot 29 of player with 1 of stained glass pane:8 named ""
        format slot 30 of player with 1 of stained glass pane:8 named ""
        format slot 31 of player with 1 of stained glass pane:8 named ""
        format slot 32 of player with 1 of stained glass pane:8 named ""
        format slot 33 of player with 1 of stained glass pane:8 named ""
        format slot 34 of player with 1 of stained glass pane:8 named ""
        format slot 35 of player with 1 of stained glass pane:8 named ""
        format slot 36 of player with 1 of stained glass pane:8 named ""
        format slot 37 of player with 1 of stained glass pane:8 named ""
        format slot 38 of player with 1 of stained glass pane:8 named ""
        format slot 39 of player with 1 of stained glass pane:8 named ""
        format slot 40 of player with 1 of stained glass pane:8 named ""
        format slot 41 of player with 1 of stained glass pane:8 named ""
        format slot 42 of player with 1 of stained glass pane:8 named ""
        format slot 43 of player with 1 of stained glass pane:8 named ""
        format slot 44 of player with 1 of stained glass pane:8 named ""
        format slot 45 of player with 1 of stained glass pane:8 named ""
        format slot 46 of player with 1 of stained glass pane:8 named ""
        format slot 47 of player with 1 of stained glass pane:8 named ""
        format slot 48 of player with 1 of stained glass pane:8 named ""
        format slot 49 of player with 1 of stained glass pane:8 named ""
        format slot 50 of player with 1 of stained glass pane:8 named ""