[CityBuild-1][04:43:26 ERROR]: Error occurred while enabling CBSystem v1.0-SNAPSHOT (Is it up to date?)

[CityBuild-1]java.lang.NullPointerException: null

[CityBuild-1] at de.cbsystem.Main.onEnable(Main.java:40) ~[?:?]

[CityBuild-1] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:500) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:414) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:467) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:249) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:942) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:176) ~[patched_1.16.5.jar:git-Purpur-980]

[CityBuild-1] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]