- Complete server log

If it's a configuration issue, please also supply the config file.
You can use pastebin.com for the server log and configuration file.

**Describe the bug**
Came when was testing spells with a friend on my server

**To Reproduce**
[HPS]: Task #38901 for HarryPotterSpells v1.2.3 BETA generated an exception
Console 20:15:56
java.lang.IllegalArgumentException: Material cannot be null
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:122) ~[patched_1.16.2.jar:git-Paper-157]
at org.bukkit.craftbukkit.v1_16_R2.block.CraftBlock.setType(CraftBlock.java:172) ~[patched_1.16.2.jar:git-Paper-157]
at org.bukkit.craftbukkit.v1_16_R2.block.CraftBlock.setType(CraftBlock.java:167) ~[patched_1.16.2.jar:git-Paper-157]
at com.hpspells.core.spell.Glacius$1$1.run(Glacius.java:91) ~[?:?]
at org.bukkit.craftbukkit.v1_16_R2.scheduler.CraftTask.run(CraftTask.java:99) ~[patched_1.16.2.jar:git-Paper-157]
at org.bukkit.craftbukkit.v1_16_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468) ~[patched_1.16.2.jar:git-Paper-157]
at net.minecraft.server.v1_16_R2.MinecraftServer.b(MinecraftServer.java:1296) ~[patched_1.16.2.jar:git-Paper-157]
at net.minecraft.server.v1_16_R2.DedicatedServer.b(DedicatedServer.java:375) ~[patched_1.16.2.jar:git-Paper-157]
at net.minecraft.server.v1_16_R2.MinecraftServer.a(MinecraftServer.java:1211) ~[patched_1.16.2.jar:git-Paper-157]
at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:999) ~[patched_1.16.2.jar:git-Paper-157]
at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.2.jar:git-Paper-157]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_265]


**Additional context**
When was testing it out on my test server got the error when shooting spells around the world and saw it in my side eyes in console so copied it