Could not load 'plugins/Sign.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `de.gusosasi.sign.main.main'
at org.bukkit.plugin.java.PluginClassLoader.‹init›(PluginClassLoader.java:65) ~[patched_1.14.4.jar:git-Paper-174]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:134) ~[patched_1.14.4.jar:git-Paper-174]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:337) ~[patched_1.14.4.jar:git-Paper-174]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:257) ~[patched_1.14.4.jar:git-Paper-174]
at org.bukkit.craftbukkit.v1_14_R1.CraftServer.loadPlugins(CraftServer.java:355) ~[patched_1.14.4.jar:git-Paper-174]
at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:226) ~[patched_1.14.4.jar:git-Paper-174]
at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:870) ~[patched_1.14.4.jar:git-Paper-174]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Caused by: java.lang.ClassNotFoundException: de.gusosasi.sign.main.main
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_222]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:139) ~[patched_1.14.4.jar:git-Paper-174]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:85) ~[patched_1.14.4.jar:git-Paper-174]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_222]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_222]
at org.bukkit.plugin.java.PluginClassLoader.‹init›(PluginClassLoader.java:63) ~[patched_1.14.4.jar:git-Paper-174]
... 7 more