[12:40:39 WARN]: [Autorank] Plugin Autorank v4.1 generated an exception while executing task 104
java.lang.NullPointerException: Nodes must be provided.
	at org.yaml.snakeyaml.nodes.NodeTuple.<init>(NodeTuple.java:28) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:163) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:306) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.configuration.file.YamlRepresenter$RepresentConfigurationSection.representData(YamlRepresenter.java:23) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:94) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:156) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:306) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.configuration.file.YamlRepresenter$RepresentConfigurationSection.representData(YamlRepresenter.java:23) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:94) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:156) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:306) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:94) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.representer.BaseRepresenter.represent(BaseRepresenter.java:64) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:242) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:206) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.yaml.snakeyaml.Yaml.dump(Yaml.java:181) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:39) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:68) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at me.armar.plugins.autorank.config.SimpleYamlConfiguration.saveFile(SimpleYamlConfiguration.java:94) ~[?:?]
	at me.armar.plugins.autorank.config.InternalPropertiesConfig.setLeaderboardLastUpdateTime(InternalPropertiesConfig.java:168) ~[?:?]
	at me.armar.plugins.autorank.leaderboard.LeaderboardHandler.updateLeaderboard(LeaderboardHandler.java:405) ~[?:?]
	at me.armar.plugins.autorank.leaderboard.LeaderboardHandler$4.run(LeaderboardHandler.java:317) ~[?:?]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_152]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_152]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]