[05:52:42] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoSuchMethodError: 'net.minecraft.server.permissions.PermissionSet net.minecraft.class_2168.permissions()'
        at knot//me.lucaaa.advancedlinks.versions.v1_21_11.NewPermissionChecker.hasPermission(NewPermissionChecker.java:8)
        at knot//me.lucaaa.advancedlinks.mod_common.data.ModMessageReceiver.hasPermission(ModMessageReceiver.java:27)
        at knot//me.lucaaa.advancedlinks.common.commands.MainCommand.onTabComplete(MainCommand.java:81)
        at knot//me.lucaaa.advancedlinks.mod_common.ModAdvancedLinks.lambda$registerCommands$1(ModAdvancedLinks.java:75)
        at knot//com.mojang.brigadier.tree.ArgumentCommandNode.listSuggestions(ArgumentCommandNode.java:71)
        at knot//com.mojang.brigadier.CommandDispatcher.getCompletionSuggestions(CommandDispatcher.java:541)
        at knot//com.mojang.brigadier.CommandDispatcher.getCompletionSuggestions(CommandDispatcher.java:523)
        at knot//net.minecraft.class_3244.method_12059(class_3244.java:616)
        at knot//net.minecraft.class_2805.method_12147(class_2805.java:37)
        at knot//net.minecraft.class_2805.method_65081(class_2805.java:9)
        at knot//net.minecraft.class_11980$class_11981.method_74450(class_11980.java:55)
        at knot//net.minecraft.class_11980.method_74449(class_11980.java:38)
        at knot//net.minecraft.server.MinecraftServer.method_76677(MinecraftServer.java:1047)
        at knot//net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:771)
        at knot//net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:301)
        at java.base/java.lang.Thread.run(Thread.java:1583)