bug： ‘snapshot_20161220‘ was designed for MC 1.11! Use at your own peril._mcp-notch

ERROR    - 2020-08-10 07:45:52,985 - [minerl.env.malmo.instance.726f0e launch 509] 

This mapping 'snapshot_20161220' was designed for MC 1.11! Use at your own peril.

ForgeGradle 2.2-SNAPSHOT-3966cea    
    
https://github.com/MinecraftForge/ForgeGradle  

compileJavawarning: [options] bootstrap class path not set in conjunction with -source 1.6

Note: Loading searge mappings from
 /home/ec2-user/.gradle/caches/minecraft/de/oceanlabs/mcp/mcp_snapshot/20161220/1.11.2/srgs/mcp-srg.srg
/home/ec2-user/.gradle/caches/minecraft/de/oceanlabs/mcp/mcp_snapshot/20161220/1.11.2/srgs/mcp-notch.srg

Running with arguments: 
[--userProperties, {}, --assetsDir, 
/home/ec2-user/.gradle/caches/minecraft/assets, --assetIndex, 1.11, --accessToken{REDACTED}, 
--version, 1.11.2, --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker, 
--tweakClass, net.minecraftforge.gradle.tweakers.CoremodTweaker]

Forge Mod Loader version 13.20.0.2228 for Minecraft 1.11.2 loading

The coremo
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