How to fix the error when starting the console; PermissionEx plugin?

Question

Java

How to fix PermissionEx plugin error
[Server thread/ERROR]: Could not load 'plugins/PermissionsEx.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
at org.bukkit.plugin.java.JavaPluginLoader .getPluginDescription(JavaPluginLoader.java:162) ~[core.jar:git-Spigot-c3c767f-33d5de3]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:133) [core.jar:git-Spigot-c3c767f -33d5de3]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:291) [core.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer. java:152) [core.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [core.jar:git-Spigot-c3c767f-33d5de3]
at java.lang.Thread.run(Thread.java:745) [?: 1.8.0_45]
Caused by: java.util.zip.ZipException: zip file is empty
at java.util.zip.ZipFile.open(Native Method) ~[?:1.8.0_45]
at java.util.zip.ZipFile. (ZipFile.java:220) ~[?:1.8.0_45]
at java.util.zip.ZipFile.(ZipFile.java:150) ~[?:1.8.0_45]
at java.util.jar.JarFile.(JarFile .java:166) ~[?:1.8.0_45]
at java.util.jar.JarFile.(JarFile.java:130) ~[?:1.8.0_45]
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription( JavaPluginLoader.java:150) ~[core.jar:git-Spigot-c3c767f-33d5de3]
... 5 more
[22:39:35] [Server thread/INFO]: Set PluginClassLoader as parallel capable
[22:39:36] [Server thread/ERROR]: Could not load 'plugins/ChangeSkin.jar' in folder 'plugins'
org. bukkit.plugin.UnknownDependencyException: ProtocolLib
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:219) [core.jar:git-Spigot-c3c767f-33d5de3]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins( CraftServer.java:291) [core.jar:git-Spigot-c3c767f-33d5de3]
at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:152) [core.jar:git-Spigot-c3c767f-33d5de3 ]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [core.jar:git-Spigot-c3c767f-33d5de3]
at java.lang.Thread.run(Thread.java:745)[?:1.8.0_45]

Answer 1

Judging by the "java.util.zip.ZipException: zip file is empty" error, one of your jar files is broken and needs to be replaced.