Sign currentSign = (Sign) event.getClickedBlock().getState();  
String[] signText = currentSign.getLines();  
String[] changedSignText = new String[signText.length];  
Location currLoc = currentSign.getLocation(); 
boolean textLimit = false;

/* Send message */
refs.sendFancyMsg("wwcSignTranslateStart", "", "&d&l", event.getPlayer());

/* Translate each line of sign */
for (int i = 0; i < changedSignText.length; i++) {
String eaLine = refs.translateText(signText[i], event.getPlayer());
changedSignText[i] = eaLine;
}      

event.getPlayer().sendSignChange(currLoc, changedSignText); 

 [14:52:38] [Server thread/WARN]: java.lang.NullPointerException: Cannot invoke "net.minecraft.world.level.World.H_()" because the return value of "net.minecraft.world.level.block.entity.TileEntity.i()" is null
[14:52:38] [Server thread/WARN]:        at net.minecraft.network.protocol.game.PacketPlayOutTileEntityData.a(SourceFile:30)
[14:52:38] [Server thread/WARN]:        at net.minecraft.network.protocol.game.PacketPlayOutTileEntityData.a(SourceFile:35)
[14:52:38] [Server thread/WARN]:        at net.minecraft.world.level.block.entity.TileEntitySign.l(TileEntitySign.java:323)
[14:52:38] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_20_R4.entity.CraftPlayer.sendSignChange(CraftPlayer.java:814)
[14:52:38] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_20_R4.entity.CraftPlayer.sendSignChange(CraftPlayer.java:789)
[14:52:38] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_20_R4.entity.CraftPlayer.sendSignChange(CraftPlayer.java:784)
[14:52:38] [Server thread/WARN]:        at com.badskater0729.worldwidechat.listeners.TranslateInGameListener$3$1.run(TranslateInGameListener.java:233)
[14:52:38] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_20_R4.scheduler.CraftTask.run(CraftTask.java:82)
[14:52:38] [Server thread/WARN]:        at org.bukkit.craftbukkit.v1_20_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:415)
[14:52:38] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1397)
[14:52:38] [Server thread/WARN]:        at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:402)
[14:52:38] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1293)
[14:52:38] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1064)
[14:52:38] [Server thread/WARN]:        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:311)
[14:52:38] [Server thread/WARN]:        at java.base/java.lang.Thread.run(Thread.java:1583)