Bukkit

What steps will reproduce the problem?
Start or restart the server

What is the expected output? What do you see instead?
I see the below:

[15:55:56 ERROR]: [ServerLaws] Cannot load configuration from jar
org.bukkit.configuration.InvalidConfigurationException: expected '<document start>', but found BlockMappingStart
in 'string', line 12, column 1:
    Version: 1.5.1
    ^
        at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:57) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.plugin.java.JavaPlugin.reloadConfig(JavaPlugin.java:214) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.plugin.java.JavaPlugin.getConfig(JavaPlugin.java:162) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at com.gmail.josemanuelgassin.ServerLaws._ServerLaws.cargarCFG(_ServerLaws.java:70) [ServerLaws.jar:?]
        at com.gmail.josemanuelgassin.ServerLaws._ServerLaws.onEnable(_ServerLaws.java:54) [ServerLaws.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:335) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:355) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:315) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:402) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:370) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:325) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:211) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:494) [spigot.jar:git-Spigot-b1e6da1-17962f6]
        at java.lang.Thread.run(Thread.java:744) [?:1.7.0_55]
Caused by: org.yaml.snakeyaml.parser.ParserException: expected '<document start>', but found BlockMappingStart
in 'string', line 12, column 1:
    Version: 1.5.1
    ^
        at org.yaml.snakeyaml.parser.ParserImpl$ParseDocumentStart.produce(ParserImpl.java:225) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:108) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.yaml.snakeyaml.Yaml.load(Yaml.java:400) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:55) ~[spigot.jar:git-Spigot-b1e6da1-17962f6]
        ... 15 more

What version of the product are you using?
The latest, 1.5.1

Do you have an error log of what happened?
Yes, as above.

Please provide any additional information below.
Spigot 1.8

I've fixed it now by deleting the ServerLaws folder and jar, re-downloading it and then editing the config back to exactly what it was.
Just wanted to make you aware of this in case it was something bad.