I am trying to create a java plugin for my mc server with redis... but i get an error

[20:53:32 WARN]: Exception encountered when loading plugin: TerraManager java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig at com.terra.abmr.terraManager.TerraManager.onEnable(TerraManager.java:34) ~[?:?] at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:392) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] at net.md_5.bungee.BungeeCord.start(BungeeCord.java:338) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:57) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:111) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:67) ~[FlameCord.jar<:git:989626598036766721>Waterfall-Bootstrap:1.21-R0.4-SNAPSHOT:4bb20ae:unknown] at java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?] ... 5 more