Help mcreator won't install

Here is the error log:

   
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Build info: MCreator 1.8.0, 64-bit, 6032 MB, Windows 10, JVM 1.8.0_172
C:\Pylo\MCreator180\forge>gradlew -Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" cleanCache clean setupDecompWorkspace --refresh-dependencies 
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-ee3e3df        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
                 Powered by MCP                  
             http://modcoderpack.com             
     by: Searge, ProfMobius, R4wk, ZeuX          
     Fesh0r, IngisKahn, bspkrs, LexManos         
#################################################
:cleanCache
:clean UP-TO-DATE
:deobfCompileDummyTask
:deobfProvidedDummyTask
:getVersionJson
:extractUserdev
:extractDependencyATs SKIPPED
:extractMcpData
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all dependencies for configuration ':forgeGradleMcpMappings'.
> Could not resolve de.oceanlabs.mcp:mcp_snapshot:20171003-1.12.
  Required by:
      com.yourname.modid:forge:1.0
> Could not resolve de.oceanlabs.mcp:mcp_snapshot:20171003-1.12.
> Could not parse Ivy file C:\Users\Kaleo\.mcreator\gradle\caches\modules-2\metadata-2.16\descriptors\de.oceanlabs.mcp\mcp_snapshot\20171003-1.12\58d026f73bd51b2d7316bd092d31aca0\ivy.xml
> Content is not allowed in prolog.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
:extractMcpMappings
BUILD FAILED
Total time: 47.492 secs
C:\Pylo\MCreator180\forge>
Task completed with return code 0 in 48743 milliseconds