楼主前些天还可以开服，最近就开不了了，开服时，后台出了这样些东西，大家看看有谁懂的！
[23:13:34] [main/FATAL]: Failed to start the minecraft server
java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at com.google.common.collect.Lists$ReverseList.<init>(Lists.java:767) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at com.google.common.collect.Lists.reverse(Lists.java:759) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at net.minecraft.server.v1_8_R3.UserCache.b(UserCache.java:191) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at net.minecraft.server.v1_8_R3.UserCache.<init>(UserCache.java:70) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at net.minecraft.server.v1_8_R3.MinecraftServer.<init>(MinecraftServer.java:132) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at net.minecraft.server.v1_8_R3.DedicatedServer.<init>(DedicatedServer.java:43) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at net.minecraft.server.v1_8_R3.MinecraftServer.main(MinecraftServer.java:923) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]
at org.bukkit.craftbukkit.Main.main(Main.java:193) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-7911b3e]