Hi, i create a new server and added the plugin to my server but the console keep showing me an error that say this:

WARN
21:04:15
[PowerRanks]: Task #41 for PowerRanks v1.10.7 generated an exception
Console
21:04:15
java.lang.NullPointerException: Cannot invoke "nl.svenar.common.structure.PRRank.getWeight()" because "rank" is null
at nl.svenar.powerranks.data.TablistManager.updateSorting(TablistManager.java:309) ~[PowerRanks.jar:?]
at nl.svenar.powerranks.data.TablistManager$1.run(TablistManager.java:116) ~[PowerRanks.jar:?]
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftTask.run(CraftTask.java:101) ~[paper-1.20.1.jar:git-Paper-100]
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:480) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1480) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1394) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1171) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-100]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

I tried to disable all my plugins except vault and this one but then it change to this problem
WARN
21:06:22
[PowerRanks]: Task #49 for PowerRanks v1.10.7 generated an exception
Console
21:06:22
java.lang.NullPointerException: Cannot invoke "nl.svenar.common.structure.PRRank.getWeight()" because "rank" is null
at nl.svenar.powerranks.data.TablistManager.updateSorting(TablistManager.java:309) ~[PowerRanks.jar:?]
at nl.svenar.powerranks.data.TablistManager$1.run(TablistManager.java:116) ~[PowerRanks.jar:?]
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftTask.run(CraftTask.java:101) ~[paper-1.20.1.jar:git-Paper-100]
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:480) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1480) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1394) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1171) ~[paper-1.20.1.jar:git-Paper-100]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-100]
at java.lang.Thread.run(Thread.java:833) ~[?:?]