Exception in thread "main" java.lang.NullPointerException
        at net.sf.l2j.gameserver.skills.SkillsEngine.loadAllSkills(SkillsEngine.
java:252)
        at net.sf.l2j.gameserver.SkillTable.<init>(SkillTable.java:303)
        at net.sf.l2j.gameserver.SkillTable.getInstance(SkillTable.java:53)
        at net.sf.l2j.gameserver.GameServer.<init>(GameServer.java:211)
        at net.sf.l2j.Server.main(Server.java:73)