java.lang.IllegalStateException: Unregistered scoreboard component
    at org.bukkit.craftbukkit.v1_15_R1.scoreboard.CraftObjective.checkState(CraftObjective.java:137) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.scoreboard.CraftObjective.unregister(CraftObjective.java:129) ~[patched_1.15.2.jar:git-Paper-193]
    at com.gmail.nossr50.util.scoreboards.ScoreboardWrapper.loadObjective(ScoreboardWrapper.java:391) ~[?:?]
    at com.gmail.nossr50.util.scoreboards.ScoreboardWrapper.setTypeSkill(ScoreboardWrapper.java:302) ~[?:?]
    at com.gmail.nossr50.util.scoreboards.ScoreboardManager.enablePlayerSkillLevelUpScoreboard(ScoreboardManager.java:276) ~[?:?]
    at com.gmail.nossr50.util.scoreboards.ScoreboardManager.handleLevelUp(ScoreboardManager.java:232) ~[?:?]
    at com.gmail.nossr50.listeners.SelfListener.onPlayerLevelUp(SelfListener.java:49) ~[?:?]
    at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor560.execute(Unknown Source) ~[?:?]
    at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.15.2.jar:git-Paper-193]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.15.2.jar:git-Paper-193]
    at com.gmail.nossr50.util.EventUtils.tryLevelChangeEvent(EventUtils.java:197) ~[?:?]
    at com.gmail.nossr50.datatypes.player.McMMOPlayer.checkXp(McMMOPlayer.java:617) ~[?:?]
    at com.gmail.nossr50.datatypes.player.McMMOPlayer.applyXpGain(McMMOPlayer.java:587) ~[?:?]
    at com.gmail.nossr50.datatypes.player.McMMOPlayer.beginUnsharedXpGain(McMMOPlayer.java:550) ~[?:?]
    at com.gmail.nossr50.datatypes.player.McMMOPlayer.beginXpGain(McMMOPlayer.java:537) ~[?:?]
    at com.gmail.nossr50.skills.SkillManager.applyXpGain(SkillManager.java:36) ~[?:?]
    at com.gmail.nossr50.skills.acrobatics.AcrobaticsManager.dodgeCheck(AcrobaticsManager.java:107) ~[?:?]
    at com.gmail.nossr50.util.skills.CombatUtils.processCombatAttack(CombatUtils.java:301) ~[?:?]
    at com.gmail.nossr50.listeners.EntityListener.onEntityDamageByEntity(EntityListener.java:426) ~[?:?]
    at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor543.execute(Unknown Source) ~[?:?]
    at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.15.2.jar:git-Paper-193]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:232) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:999) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:886) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:842) ~[patched_1.15.2.jar:git-Paper-193]
    at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:1031) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityLiving.damageEntity0(EntityLiving.java:1691) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityHuman.damageEntity0(EntityHuman.java:878) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityLiving.damageEntity(EntityLiving.java:1049) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityHuman.damageEntity(EntityHuman.java:801) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityPlayer.damageEntity(EntityPlayer.java:755) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityLargeFireball.a(EntityLargeFireball.java:26) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.EntityFireball.tick(EntityFireball.java:80) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.WorldServer.entityJoinedWorld(WorldServer.java:794) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.World.a(World.java:863) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.WorldServer.doTick(WorldServer.java:516) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1306) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1164) ~[patched_1.15.2.jar:git-Paper-193]
    at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:958) ~[patched_1.15.2.jar:git-Paper-193]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]