Bukkit

Hello

[17:50:36] [Server thread/ERROR]: Could not load 'plugins/PartlyFancy_BETA-1.0.1.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:78) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at org.bukkit.craftbukkit.v1_11_R1.CraftServer.loadPlugins(CraftServer.java:301) [spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:204) [spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:160) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:76) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
... 6 more
Caused by: java.util.zip.ZipException: zip file is empty
at java.util.zip.ZipFile.open(Native Method) ~[?:1.8.0_121]
at java.util.zip.ZipFile.<init>(ZipFile.java:219) ~[?:1.8.0_121]
at java.util.zip.ZipFile.<init>(ZipFile.java:149) ~[?:1.8.0_121]
at java.util.jar.JarFile.<init>(JarFile.java:166) ~[?:1.8.0_121]
at java.util.jar.JarFile.<init>(JarFile.java:130) ~[?:1.8.0_121]
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:148) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:76) ~[spigot.jar:git-Spigot-a3f6ea5-a2af8f0]
... 6 more

Thank

Try redownloading the plugin and restarting your server, it seems to be a failed download, so that should fix it.  If it doesn't, downgrade by one version and try that.