[CMILib] Task #48 for CMILib v1.4.7.8 generated an exception

[FortyTwoCn]

[17:35:10] [Server thread/WARN]: [CMILib] Task #48 for CMILib v1.4.7.8 generated an exception
java.lang.IllegalArgumentException: Cannot get key of Legacy Material
at org.apache.commons.lang.Validate.isTrue(Validate.java:136) ~[commons-lang-2.6.jar:2.6]
at org.bukkit.Material.getKey(Material.java:3646) ~[forge:?]
at net.Zrips.CMILib.Items.ItemManager.lambda$load$0(ItemManager.java:136) ~[?:?]
at net.Zrips.CMILib.Version.Schedulers.CMIBukkitImpl.lambda$runTask$0(CMIBukkitImpl.java:28) ~[?:?]
at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:81) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:400) ~[forge:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:997) ~[?:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:336) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:943) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:775) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:265) ~[?:?]
at java.lang.Thread.run(Thread.java:855) [?:1.8.0_392]