La partie:
[20:03:30] [Craft Scheduler Thread - 2/INFO]: [0;37;22m[[0;33;22mSkript[0;37;22m][m Checking for the latest version of Skript...[m
[20:03:31] [skript update thread/INFO]: [0;37;22m[[0;33;22mSkript[0;37;22m][m [0;31;22mAn internal error occurred while checking for the latest version of Skript. Please refer to the server log for details.[m
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! [skript] Severe Error:
[20:03:31] [skript update thread/ERROR]: #!#! Unexpected error while checking for a new version of Skript
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! If you're developing an add-on for Skript this likely means that you have done something wrong.
[20:03:31] [skript update thread/ERROR]: #!#! If you're a server admin however please go to http://dev.bukkit.org/server-mods/skript/tickets/
[20:03:31] [skript update thread/ERROR]: #!#! and check whether this error has already been reported.
[20:03:31] [skript update thread/ERROR]: #!#! If not please create a new ticket with a meaningful title, copy & paste this whole error into it,
[20:03:31] [skript update thread/ERROR]: #!#! and describe what you did before it happened and/or what you think caused the error.
[20:03:31] [skript update thread/ERROR]: #!#! If you think that it's a trigger that's causing the error please post the trigger as well.
[20:03:31] [skript update thread/ERROR]: #!#! By following this guide fixing the error should be easy and done fast.
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! Stack trace:
[20:03:31] [skript update thread/ERROR]: #!#! javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1]
Message: Premature end of file.
[20:03:31] [skript update thread/ERROR]: #!#! at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:596)
[20:03:31] [skript update thread/ERROR]: #!#! at com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java:83)
[20:03:31] [skript update thread/ERROR]: #!#! at ch.njol.skript.Updater.getChangelogs(Updater.java:286)
[20:03:31] [skript update thread/ERROR]: #!#! at ch.njol.skript.Updater$2.run(Updater.java:210)
[20:03:31] [skript update thread/ERROR]: #!#! at java.lang.Thread.run(Thread.java:745)
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! Version Information:
[20:03:31] [skript update thread/ERROR]: #!#! Skript: 2.2-SNAPSHOT
[20:03:31] [skript update thread/ERROR]: #!#! Bukkit: 1.8.8-R0.1-SNAPSHOT
[20:03:31] [skript update thread/ERROR]: #!#! Minecraft: 1.8.8
[20:03:31] [skript update thread/ERROR]: #!#! Java: 1.8.0_101 (Java HotSpot(TM) 64-Bit Server VM 25.101-b13)
[20:03:31] [skript update thread/ERROR]: #!#! OS: Linux amd64 2.6.32-openvz-042stab116.2-amd64
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! Running CraftBukkit: false
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! Current node: null
[20:03:31] [skript update thread/ERROR]: #!#! Current item: null
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! Thread: Skript update thread
[20:03:31] [skript update thread/ERROR]: #!#!
[20:03:31] [skript update thread/ERROR]: #!#! End of Error.
[20:03:31] [skript update thread/ERROR]: #!#!
est tout a fait anodine.
Pour le début, c'est qu'il te manque des addons pour faire fonctionner le skript en question. Il te manque SkQuery.