Rankups.yml dkperms error

[02:21:54] [Server thread/INFO]: Wodoso issued server command: /rankup
[02:21:54] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'rankup' in plugin EZRanksPro v1.7.2
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Prison.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[Prison.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1399) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1234) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_201]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_201]
	at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [Prison.jar:git-Spigot-dcd1643-e60fc34]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.UnsupportedOperationException: SuperPerms no group permissions.
	at net.milkbowl.vault.permission.plugins.Permission_SuperPerms.getPrimaryGroup(Permission_SuperPerms.java:96) ~[?:?]
	at net.milkbowl.vault.permission.Permission.getPrimaryGroup(Permission.java:679) ~[?:?]
	at net.milkbowl.vault.permission.Permission.getPrimaryGroup(Permission.java:691) ~[?:?]
	at me.clip.ezrankspro.vault.VaultPerms.getPrimaryGroup(VaultPerms.java:52) ~[?:?]
	at me.clip.ezrankspro.commands.RankupCommand.onCommand(RankupCommand.java:177) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Prison.jar:git-Spigot-dcd1643-e60fc34]
	... 15 more