Crash Error

[22:48:31] [INFO] Error info:
[22:48:31] [INFO] <> Error message: Could not load configuration file: /data/./world/settings/biomes/custom/MUSHROOM_ISLAND.json. The file should be an derivation of the class class minelazz.IIIiiiiIII. Error message: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 221 column 10 path $.overlaySettings.surfaceBlocks[0][0]
[22:48:31] [INFO] <> Stack trace:
[22:48:31] [INFO] java.lang.Exception: Could not load configuration file: /data/./world/settings/biomes/custom/MUSHROOM_ISLAND.json. The file should be an derivation of the class class minelazz.IIIiiiiIII. Error message: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 221 column 10 path $.overlaySettings.surfaceBlocks[0][0]
[22:48:31] at minelazz.IiIiIIIIII.H(ua:97)
[22:48:31] at minelazz.iiiIIiIIiI.loadBiomeSettingsFromFile(md:272)
[22:48:31] at minelazz.iiiIIiIIiI.loadBiomeSettings(md:337)
[22:48:31] at minelazz.iiiIIiIIiI.load(md:184)
[22:48:31] at minelazz.iiiIIiIIiI.<init>(md:77)
[22:48:31] at minelazz.iIIiIIIiII.<init>(fh:306)
[22:48:31] at minelazz.IIiIiIIIIi.H(ad:184)
[22:48:31] at minelazz.IIiIiIIIIi.<init>(ad:128)
[22:48:31] at minelazz.iiiiiIiIiI.<init>(al:178)
[22:48:31] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[22:48:31] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
[22:48:31] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
[22:48:31] at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
[22:48:31] at minelazz.iiIiIiiiIi.getEpicWorld(pk:146)
[22:48:31] at com.minelazz.epicworldgenerator.EpicWorldGenerator.H(df:522)
[22:48:31] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[22:48:31] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[22:48:31] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[22:48:31] at java.lang.reflect.Method.invoke(Method.java:498)
[22:48:31] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302)
[22:48:31] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[22:48:31] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499)
[22:48:31] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484)
[22:48:31] at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:325)
[22:48:31] at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272)
[22:48:31] at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545)
[22:48:31] at java.lang.Thread.run(Thread.java:748)
[22:48:31] [INFO] ------------------------------------------------------------
[22:48:31] [INFO] If this is not a configuration fault, report the issue here;
[22:48:31] [INFO] >> https://bitbucket.org/DynamicBytes/epicworldgenerator/issues
[22:48:31] [INFO] Upload this crash report to hastebin.com or pastebin.com
[22:48:31] [INFO] and put the link in your issue report.
[22:48:31] [INFO] ------------------------------------------------------------