[17:57:54 INFO]: [BetonQuest] Hooking into PlaceholderAPI
[17:57:54 INFO]: [PlaceholderAPI] Successfully registered expansion: betonquest
[17:57:54 INFO]: [BetonQuest] Hooking into Vault
[17:57:54 INFO]: [BetonQuest] Hooking into ProtocolLib
[17:57:54 INFO]: [BetonQuest] Hooking into Citizens
[17:57:54 ERROR]: Error occurred while enabling BetonQuest v1.12.4 (Is it up to date?)
java.lang.NoSuchFieldError: PLAYER_COMBAT_ENTER
        at pl.betoncraft.betonquest.compatibility.protocollib.hider.EntityHider.<clinit>(EntityHider.java:41) ~[?:?]
        at pl.betoncraft.betonquest.compatibility.protocollib.hider.NPCHider.<init>(NPCHider.java:42) ~[?:?]
        at pl.betoncraft.betonquest.compatibility.protocollib.hider.NPCHider.start(NPCHider.java:55) ~[?:?]
        at pl.betoncraft.betonquest.compatibility.citizens.CitizensIntegrator.hook(CitizensIntegrator.java:38) ~[?:?]
        at pl.betoncraft.betonquest.compatibility.Compatibility.hook(Compatibility.java:162) ~[?:?]
        at pl.betoncraft.betonquest.compatibility.Compatibility.<init>(Compatibility.java:85) ~[?:?]
        at pl.betoncraft.betonquest.BetonQuest.onEnable(BetonQuest.java:784) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:316) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:395) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:344) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:442) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:403) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:341) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:289) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
[17:57:54 INFO]: [BetonQuest] Disabling BetonQuest v1.12.4
[17:57:54 ERROR]: Error occurred while disabling BetonQuest v1.12.4 (Is it up to date?)
java.lang.NullPointerException: null
        at pl.betoncraft.betonquest.BetonQuest.onDisable(BetonQuest.java:1093) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:266) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:350) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:437) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:320) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:395) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:344) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:442) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:403) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:341) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:289) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[paper_1.12.2_1618.jar:git-Paper-1618]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]

看起来是与Citizens插件不太兼容，看看你的BQ版本是否安装了对应版本的Citizens?

我都是新的

刚刚分析了一下源码，你的ProtocolLib是最新的吗？

是的，公民2，BQ，ProtocolLib都是新的

ProtocolLib.jar (4.46 MB, 下载次数: 2)
我刚刚下载最新源代码构建了一份PL，请试试这个。
（即无论如何，看看这个能不能用）

我把BQ回退到1.12.3版本就可以了，应该是作者问题