Error

[18:44:19 ERROR]: Error occurred while enabling RandomPackage v16.5.9 (Is it up to date?)
java.lang.NoClassDefFoundError: com/massivecraft/factions/iface/RelationParticipator
        at me.randomhashtags.randompackage.supported.RegionalAPI.trySupportingFactions(RegionalAPI.java:55) ~[?:?]
        at me.randomhashtags.randompackage.supported.RegionalAPI.setup(RegionalAPI.java:40) ~[?:?]
        at me.randomhashtags.randompackage.RandomPackage.enable(RandomPackage.java:82) ~[?:?]
        at me.randomhashtags.randompackage.RandomPackage.onEnable(RandomPackage.java:59) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292) ~[spigot.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.enablePlugin(CraftServer.java:373) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.enablePlugins(CraftServer.java:323) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.MinecraftServer.t(MinecraftServer.java:412) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.MinecraftServer.l(MinecraftServer.java:377) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.MinecraftServer.a(MinecraftServer.java:332) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.DedicatedServer.init(DedicatedServer.java:271) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:535) [spigot.jar:git-Spigot-72c2605-251a5b6]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.lang.ClassNotFoundException: com.massivecraft.factions.iface.RelationParticipator
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot.jar:git-Spigot-72c2605-251a5b6]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-72c2605-251a5b6]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_241]
        ... 15 more