[Orebfuscator not working.]

Thankyou so much for the help, now it blocks most ores. Thankyou for replying quickly and helping me out with that. I hope you have a good day

[Orebfuscator not working.]

Thankyou for informing me of this. I tried to work in the server built in one but it still doesn't work with this texturepack https://www.curseforge.com/minecraft/texture-packs/xray-ultimate-1-11-compatible/download. Here are the settings: 

 anti-xray:
      enabled: true
      engine-mode: 1
      max-chunk-section-index: 3
      update-radius: 2
      lava-obscures: true
      use-permission: false
      hidden-blocks:
        - gold_ore
        - iron_ore
        - coal_ore
        - lapis_ore
        - mossy_cobblestone
        - obsidian
        - chest
        - diamond_ore
        - redstone_ore
        - clay
        - emerald_ore
        - ender_chest
      replacement-blocks:
        - stone
        - oak_planks
    viewdistances:
      no-tick-view-distance: -1

For some reason with the texture pack on I can still x-ray. Please tell me if I have something wrong.

[Orebfuscator not working.]

I have installed Orebfuscator on my server to stop x-raying and it doesn't load properly. I went into the server logs and this is what is says

[02:03:43] [Server thread/INFO]: [Orebfuscator4] Enabling Orebfuscator4 v4.4.3
[02:03:43] [Server thread/ERROR]: Error occurred while enabling Orebfuscator4 v4.4.3 (Is it up to date?)
java.lang.NullPointerException: null
    at com.lishid.orebfuscator.utils.MaterialHelper.init(MaterialHelper.java:24) ~[?:?]
    at com.lishid.orebfuscator.Orebfuscator.onEnable(Orebfuscator.java:70) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[server.jar:git-Paper-"36d7de3"]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[server.jar:git-Paper-"36d7de3"]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:476) ~[server.jar:git-Paper-"36d7de3"]
    at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:501) ~[server.jar:git-Paper-"36d7de3"]
    at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:415) ~[server.jar:git-Paper-"36d7de3"]
    at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:207) ~[server.jar:git-Paper-"36d7de3"]
    at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:935) ~[server.jar:git-Paper-"36d7de3"]
    at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:173) ~[server.jar:git-Paper-"36d7de3"]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
[02:03:43] [Server thread/INFO]: [Orebfuscator4] Disabling Orebfuscator4 v4.4.3
[02:03:43] [Server thread/ERROR]: Error occurred while disabling Orebfuscator4 v4.4.3 (Is it up to date?)
java.lang.NullPointerException: null
    at com.lishid.orebfuscator.cache.ObfuscatedDataCache.getInternalCache(ObfuscatedDataCache.java:40) ~[?:?]
    at com.lishid.orebfuscator.cache.ObfuscatedDataCache.closeCacheFiles(ObfuscatedDataCache.java:66) ~[?:?]
    at com.lishid.orebfuscator.Orebfuscator.onDisable(Orebfuscator.java:172) ~[?:?]

I am guessing it needs updating so plz update but if I am wrong please tell me. I play on a free server and just want to stop people x-raying. If they need to update the plugin please tell me how to tell them to update it, if it is something else please tell me.

Here is the link to the plugin https://www.spigotmc.org/resources/orebfuscator.22818/