error in 1.16.2

[22:20:36] [Server thread/ERROR]: Could not load 'plugins\EpicFurnaces-4.5.10.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/songoda/skyblock/permission/BasicPermission
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:141) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.craftbukkit.v1_16_R1.CraftServer.loadPlugins(CraftServer.java:388) ~[patched_1.16.1.jar:git-Paper-79]
	at net.minecraft.server.v1_16_R1.DedicatedServer.init(DedicatedServer.java:208) ~[patched_1.16.1.jar:git-Paper-79]
	at net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:940) ~[patched_1.16.1.jar:git-Paper-79]
	at net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.1.jar:git-Paper-79]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]
Caused by: java.lang.NoClassDefFoundError: com/songoda/skyblock/permission/BasicPermission
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_251]
	at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_251]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:68) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[patched_1.16.1.jar:git-Paper-79]
	... 7 more
Caused by: java.lang.ClassNotFoundException: com.songoda.skyblock.permission.BasicPermission
	at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_251]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:171) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[patched_1.16.1.jar:git-Paper-79]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_251]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_251]
	at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_251]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:68) ~[patched_1.16.1.jar:git-Paper-79]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[patched_1.16.1.jar:git-Paper-79]
	... 7 more