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[Skript] Reloading kop.sk...

can't understand this event: 'on placeholder request with prefix "topka" (kop.sk, line 7: on placeholder request with prefix "topka":')

[Skript] Encountered 1 error while reloading kop.sk!

on block break:
    add 1 to {bloki::%player%}

every 5 seconds:
    set {topka::*} to createTop("bloki", 10, "&7[INDEX] &6[PLAYER]&7: &e[VALUE]")

---tutaj---> on placeholder request with prefix "topka": <----tutaj----
    if the identifier is "bloki":
        set the result to "%{topka::*}%"
#dodaj placeholder na scoreboardzie {topka_bloki}

function createTop(name: string, size: integer, format: string="[P] - [V]") :: strings:
    set {_indices::*} to all indices of {%{_name}%::*}
    set {_index} to 1
    if {_size} = 0:
        return ""
    if {_size} < 0:
        set {_reversed} to true
        set {_size} to ({_size} * (-1))
    loop {_indices::*}:
        if {%{_name}%::%loop-value%} = number or timespan or date:
            set {_values::%{_index}%} to {%{_name}%::%loop-value%}
            set {_indexes::%{_index}%} to "%loop-value%"
            add 1 to {_index}
    if {_size} > (size of {_indexes::*}):
        set {_size} to (size of {_indexes::*})
    loop {_size} times:
        loop {_values::*}:
            if {_max} is not set:
                set {_max} to loop-value-2
                set {_index} to loop-index
            else:
                if {_reversed} is not true:
                    if loop-value-2 > {_max}:
                        set {_max} to loop-value-2
                        set {_index} to loop-index
                else:
                    if loop-value-2 < {_max}:
                        set {_max} to loop-value-2
                        set {_index} to loop-index
        set {_var} to {_format}
        replace "[VALUE]" and "[V]" with "%{_max}%" in {_var}
        replace "[INDEX]" and "[I]" with "%loop-number%" in {_var}
        replace "[PLAYER]" and "[P]" with {_indexes::%{_index}%} in {_var}
        add {_var} to {_return::*}
        delete {_indexes::%{_index}%}, {_values::%{_index}%}, {_max} and {_index}
    return {_return::*}