[17:10:53] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to ScriptBlockPlus v1.2.9
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-7d78b81-7e19325]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-7d78b81-7e19325]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.PlayerList.onPlayerJoin(PlayerList.java:327) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.PlayerList.a(PlayerList.java:160) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.LoginListener.b(LoginListener.java:147) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.LoginListener.F_(LoginListener.java:57) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.NetworkManager.a(NetworkManager.java:233) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.ServerConnection.c(ServerConnection.java:140) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:834) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot.jar:git-Spigot-7d78b81-7e19325]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.NullPointerException
        at com.github.yuttyann.scriptblockplus.file.Lang.getUpdateCheckMessages(Lang.java:328) ~[?:?]
        at com.github.yuttyann.scriptblockplus.Updater.sendCheckMessage(Updater.java:205) ~[?:?]
        at com.github.yuttyann.scriptblockplus.listener.PlayerJoinQuitListener.onPlayerJoin(PlayerJoinQuitListener.java:36) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_144]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_144]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_144]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_144]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot.jar:git-Spigot-7d78b81-7e19325]
        ... 14 more

[17:10:53] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to ScriptBlockPlus v1.2.9
org.bukkit.event.EventException
从这个语句知道了是 ScriptBlockPlus v1.2.9 中的 PlayerJoinEvent 时间造成的影响，建议将这个升级或者降级，不行就删除

ScriptBlockPlus插件，玩家加入事件出现问题，空指针异常。
尝试重装或者检查对应的插件版本。
如果当前插件不是最新的请升级最新版。
或者，配置文件中把更新检测关了呢？