Bear with me, I don't know much about coding or plugins in general. All I know is that the plugin "has a problem when running".

I'm honestly unsure what even happened, but here's the error the logs spit out:

.

"[18:35:34] [Server thread/WARN]: [S86Powers] Task #10777 for S86Powers v5.2.0 generated an exception

536 | java.lang.IllegalArgumentException: data should be class org.bukkit.inventory.ItemStack got class me.sirrus86.s86powers.powers.PowerOption
537 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2514) ~[minecraft_server.jar:git-Paper-631]
538 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2509) ~[minecraft_server.jar:git-Paper-631]
539 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2498) ~[minecraft_server.jar:git-Paper-631]
540 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2478) ~[minecraft_server.jar:git-Paper-631]
541 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2458) ~[minecraft_server.jar:git-Paper-631]
542 | at org.bukkit.craftbukkit.v1_16_R3.CraftWorld.spawnParticle(CraftWorld.java:2453) ~[minecraft_server.jar:git-Paper-631]
543 | at me.sirrus86.s86powers.powers.internal.defense.Phasewalk$1.run(Phasewalk.java:87) ~[?:?]
544 | at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:100) ~[minecraft_server.jar:git-Paper-631]
545 | at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468) ~[minecraft_server.jar:git-Paper-631]
546 | at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1423) ~[minecraft_server.jar:git-Paper-631]
547 | at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:419) ~[minecraft_server.jar:git-Paper-631]
548 | at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1338) ~[minecraft_server.jar:git-Paper-631]
549 | at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1126) ~[minecraft_server.jar:git-Paper-631]
550 | at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:289) ~[minecraft_server.jar:git-Paper-631]
551 | at java.lang.Thread.run(Thread.java:834) [?:?]"

If anyone could help me out, or even help me understand what this is, that'd be greatly appreciated.