Script is crashing my server

[iGniSs]

Hey.
I really need functions, but if I reload script with functions it crash down my server - it lag and then it crash.

Spoiler: Script

variables:
    {lvl.%player%} = 0
    {xp.%player%} = 0
command /dev:
    permission: basicland.ferda
    permission message: &fNa nahlednuti do pripravovanych funkci ma pristup jenom Emerald VIP nebo clen admin teamu.
    trigger:
        open chest with 5 row named "&8Dev menu" to player
        format slot 4 of player with redstone named "&c&l1. adventni nedele" with lore "&7Klikni pro vyzdvihnuti odmeny." to be unstealable


function openShopGui(player: player):
    open chest with 3 rows named "&c&lShop" to {_player}

Spoiler: Console log.

[14:29:33] [Server thread/INFO]: iGniSsak issued server command: /sk reload dev
[14:30:18] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: Input/output error
    at java.io.FileInputStream.readBytes(Native Method) ~[?:1.8.0_131]
    at java.io.FileInputStream.read(FileInputStream.java:255) ~[?:1.8.0_131]
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) ~[?:1.8.0_131]
    at java.io.BufferedInputStream.read(BufferedInputStream.java:265) ~[?:1.8.0_131]
    at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349) ~[server.jar:git-Spigot-d21162c-61e0c69]
    at net.minecraft.server.v1_12_R1.DedicatedServer$2.run(DedicatedServer.java:85) [server.jar:git-Spigot-d21162c-61e0c69]
[14:30:18] [Thread-3/INFO]: Stopping server

Skript version: dev32b

 

[Syst3ms]

No idea what's causing it, but :

1. Use TuSKe for GUIs
2. It's not a skript error

 

[Wynnevir]

Have you tried it on a slightly older version? I've noticed dev 32 for me throws severe errors so perhaps try it on 21?