[20:59:40 ERROR]: Error occurred while enabling MMOCore v1.2.5 (Is it up to date?)
java.lang.NoClassDefFoundError: net/mmogroup/mmolib/api/MMOLineConfig
        at net.Indyuce.mmocore.manager.CustomBlockManager.reload(CustomBlockManager.java:126) ~[?:?]
        at net.Indyuce.mmocore.MMOCore.reloadPlugin(MMOCore.java:369) ~[?:?]
        at net.Indyuce.mmocore.MMOCore.onEnable(MMOCore.java:251) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.15.2.jar:git-Paper-164]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) ~[patched_1.15.2.jar:git-Paper-164]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.15.2.jar:git-Paper-164]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:470) ~[patched_1.15.2.jar:git-Paper-164]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:384) ~[patched_1.15.2.jar:git-Paper-164]
        at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:482) ~[patched_1.15.2.jar:git-Paper-164]        at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:298) ~[patched_1.15.2.jar:git-Paper-164]
        at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:885) ~[patched_1.15.2.jar:git-Paper-164]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.lang.ClassNotFoundException: net.mmogroup.mmolib.api.MMOLineConfig
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:171) ~[patched_1.15.2.jar:git-Paper-164]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[patched_1.15.2.jar:git-Paper-164]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        ... 12 more