[18:52:11 WARN]: [MBedwars] Task #30209 for MBedwars v4.0.18.12 generated an exception
java.lang.NoSuchMethodError: 'org.bukkit.Material org.bukkit.Material.getMaterial(int)'
        at de.marcely.bedwars.bg.a(RBlock.java:43) ~[?:?]
        at de.marcely.bedwars.bm.b(SafeRegenerationProcessor.java:264) ~[?:?]
        at de.marcely.bedwars.bm.a(SafeRegenerationProcessor.java:180) ~[?:?]
        at de.marcely.bedwars.bm$1.run(SafeRegenerationProcessor.java:146) ~[?:?]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:99) ~[patched_1.16.5.jar:git-Paper-520]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468) ~[patched_1.16.5.jar:git-Paper-520]
        at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1299) ~[patched_1.16.5.jar:git-Paper-520]
        at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:377) ~[patched_1.16.5.jar:git-Paper-520]
        at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1214) ~[patched_1.16.5.jar:git-Paper-520]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1002) ~[patched_1.16.5.jar:git-Paper-520]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:175) ~[patched_1.16.5.jar:git-Paper-520]
        at java.lang.Thread.run(Thread.java:834) [?:?]