SpigotVIP MCG Minestore a Complete and Customisable Donation System 3.4.0.2

Can you fix it?

[10:10:03 INFO]: ( \/ )(_ _)( \( )( ___)/ __)(_ _)( _ )( _ \( ___)
[10:10:03 INFO]: ) ( _)(_ ) ( )__) \__ \ )( )(_)( ) / )__)
[10:10:03 INFO]: (_/\/\_)(____)(_)\_)(____)(___/ (__) (_____)(_)\_)(____)
[10:10:03 INFO]: >>>>>>>>>>>>>>>>>>>>MINESTORE<<<<<<<<<<<<<<<<<<<<
[10:10:03 INFO]: Welcome To MCG Mine Store!
[10:10:03 INFO]: Your user ID: null
[10:10:03 INFO]: Your instance ID: null
[10:10:03 ERROR]: Error occurred while enabling MCGMineStore v3.4.0.0 (Is it up to date?)
java.lang.NullPointerException: Cannot invoke "String.contains(java.lang.CharSequence)" because "this.userid" is null
at com.mmuziek.Minestore.System.MCGVerify.getUsernameById(MCGVerify.java:100) ~[?:?]
at com.mmuziek.Minestore.System.MCGVerify.<init>(MCGVerify.java:26) ~[?:?]
at com.mmuziek.Minestore.MineStoreCore.activate(MineStoreCore.java:403) ~[?:?]
at com.mmuziek.Minestore.MineStoreCore.onEnable(MineStoreCore.java:758) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[Server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [Server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [Server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [Server.jar:git-Spigot-db6de12-18fbb24]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [Server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [Server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [Server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [Server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [Server.jar:git-Spigot-db6de12-18fbb24]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [Server.jar:git-Spigot-db6de12-18fbb24]
at java.base/java.lang.Thread.run(Thread.java:832) [?:?]

where are the website files ?