[11:33:10 ERROR]: Could not load 'plugins/Untitled.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `me.firstflames.MyFirstPlugin'
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:42) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:325) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:298) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.<init>(CraftServer.java:260) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at net.minecraft.server.v1_12_R1.PlayerList.<init>(PlayerList.java:76) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at net.minecraft.server.v1_12_R1.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:186) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:521) [craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.ClassNotFoundException: me.firstflames.MyFirstPlugin
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_131]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_131]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_131]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit-1.12.jar:git-Bukkit-9a82fa7]
	... 10 more