Errors in console

[RoRo_Tv]

Hello, I have a problem, I created a command to remove the bossbar but when I run it, I have "A internal error occured while attempting to perform this command." In the console, I have this: https://pastebin.com/F4H1J1rU
Here is the code of my order:

command /timer [<number>]:
    trigger:
        set {_bar} to new bossbar
        set skellett title of bossbar {_bar} to "&5&lCompétences dans :&5 %arg-1% secondes"
        set color of bossbar {_bar} to BLUE #(BLUE/GREEN/PINK/PURPLE/RED/WHITE/YELLOW)
        set style of bossbar {_bar} to SEGMENTED_20 #(6/10/12/20)
        set {_denominator} to ( arg-1 ) * 20
        set {_numerator} to ( arg-1 ) * 20
        while {_numerator} >= 0:
            set {_seconds} to "%{_numerator} / 20%" parsed as integer
            set skellett title of bossbar {_bar} to "&5&lCompétences dans :&5 %{_seconds}% secondes"
            set skellett progress of bossbar {_bar} to {_numerator} / {_denominator}
            add player to bossbar {_bar}
            wait 1 tick
            remove 1 from {_numerator}
        if {_numerator} is 0:
            set skellett progress of bossbar {_bar} to {_numerator} / {_denominator}
            add player to bossbar {_bar}
            wait 3 tick
            skellett remove player from bossbar {_bar}
            stop
command /bossbarclear:
    trigger:
        skellett remove player from bossbar {_bar}

There is no error in it.
Skript addons: **SkrayFall, Skellett, SkQuery, Tuske** and skript version: 2.4.1
Thanks and sorry for my mistakes, I'am not English.

 

[pokw]

Are you sure this is a problem with the actual skript itself?