ERNANI MENDES DA FONSECA NETO

also, i found this in the crash report: "java.lang.RuntimeException: class pokelucky.MonsterBox$TileMonsterBlock is missing a mapping! This is a bug! at net.minecraft.tileentity.TileEntity.func_189516_d(TileEntity.java:78) at net.minecraft.tileentity.TileEntity.func_189517_E_(TileEntity.java:205) at net.minecraft.network.play.server.SPacketChunkData.<init>(SourceFile:52) at net.minecraft.server.management.PlayerChunkMapEntry.func_187278_c(PlayerChunkMapEntry.java:175) at net.minecraft.server.management.PlayerChunkMapEntry.func_187276_a(PlayerChunkMapEntry.java:74) at net.minecraft.server.management.PlayerChunkMap.func_72693_b(PlayerChunkMap.java:158) at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:227) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:756) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:279) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) at java.lang.Thread.run(Thread.java:745)''

when i try entering my minecraft world i get an error, i'm actually using some mods, and the world was functioning normally until yesterday when it crashed, then i couldn't ever initialize it again.. the crash report is: "WARNING: coremods are present: MekanismCoremod (Mekanism-1.12.2-9.8.3.390.jar) TLSkinCapeHookLoader (tlskincape1.12.2-1.4.jar) CTMCorePlugin (CTM-MC1.12.2-1.0.2.31.jar) ShutdownPatcher (mcef-1.12.2-0.9-coremod.jar) Contact their authors BEFORE contacting forge"