17:00:28: Executing external task 'setupDecompWorkspace'...
This mapping 'snapshot_20160518' was designed for MC 1.9.4! Use at your own peril.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'Moss'.
> Could not resolve all dependencies for configuration ':deobfCompile'.
   > Could not resolve mezz.jei:jei_1.10.2:3.12.3.293.
     Required by:
         com.yourname.modid:Moss:0.0.1
      > Could not resolve mezz.jei:jei_1.10.2:3.12.3.293.
         > Could not get resource 'https://libraries.minecraft.net/mezz/jei/jei_1.10.2/3.12.3.293/jei_1.10.2-3.12.3.293.pom'.
            > Could not GET 'https://libraries.minecraft.net/mezz/jei/jei_1.10.2/3.12.3.293/jei_1.10.2-3.12.3.293.pom'. Received status code 403 from server: Forbidden

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 3.299 secs
Could not GET 'https://libraries.minecraft.net/mezz/jei/jei_1.10.2/3.12.3.293/jei_1.10.2-3.12.3.293.pom'. Received status code 403 from server: Forbidden
17:00:31: External task execution finished 'setupDecompWorkspace'.