[02:20:43] [Server thread/ERROR]: Could not load 'plugins/FTweaks.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `net.techcable.phanatic.FTweaks'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:66) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:202) [factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:561) [factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
Caused by: java.lang.ClassNotFoundException: net.techcable.phanatic.FTweaks
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_60]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_60]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_60]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_60]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_60]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[factions.jar:git-PaperSpigot-978982e-efd6cb0]
    ... 7 more