Problem with installation

I have a problem when MCreator installs itself.
The installation of the MDK Forge has no problem, but the "setting up" crashes after a while.

First error code:

Error Code: Java_jvm_Heap_Space [-14]

Second error code:

Error Code: MCreator_setup_failed

With the second error code:

Executing gradle command: CleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Version 10.0.17134.286]
(C) 2018 Microsoft Corporation. All rights r,serv ,s.
C: \ Pylo \ MCreator179> cd forge
C: \ Pylo \ MCreator179 \ forge> SET "JAVA_HOME = C: \ Pylo \ MCreator179 \ jdk \"
C: \ Pylo \ MCreator179 \ forge> SET JAVA_EXE =% JAVA_HOME% \ bin \ java.exe
C: \ Pylo \ MCreator179 \ forge> SET PATH =% JAVA_HOME% \ bin \;% PATH%
C: \ Pylo \ MCreator179 \ forge> SET "GRADLE_USER_HOME = C: \ Users \ samue \ .mcreator \ gradle"
C: \ Pylo \ MCreator179 \ forge> gradlew -Dorg.gradle.daemon = false -Dorg.gradle.parallel = false -Dorg.gradle.jvmargs = "- Xms512m -Xmx1500m" 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
: extractMcpMappings
: genSrgs
: FAILED downloadClient
BUILD FAILED
Total time: 15 mins dry 30279
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ': downloadClient.
> Javax.net.ssl.SSLException: Connection has-been shutdown: javax.net.ssl.SSLException: java.net.SocketException: Connection reset
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
C: \ Pylo \ MCreator179 \ Forge>
Task completed with return code 0 in 937,501 milliseconds

Executing gradle command: CleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Version 10.0.17134.286]
(C) 2018 Microsoft Corporation. All rights r,serv ,s.
C: \ Pylo \ MCreator179> cd forge
C: \ Pylo \ MCreator179 \ forge> SET "JAVA_HOME = C: \ Pylo \ MCreator179 \ jdk \"
C: \ Pylo \ MCreator179 \ forge> SET JAVA_EXE =% JAVA_HOME% \ bin \ java.exe
C: \ Pylo \ MCreator179 \ forge> SET PATH =% JAVA_HOME% \ bin \;% PATH%
C: \ Pylo \ MCreator179 \ forge> SET "GRADLE_USER_HOME = C: \ Users \ samue \ .mcreator \ gradle"
C: \ Pylo \ MCreator179 \ forge> gradlew -Dorg.gradle.daemon = false -Dorg.gradle.parallel = false -Dorg.gradle.jvmargs = "- Xms512m -Xmx1500m" 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
: extractMcpMappings
: genSrgs
: downloadClient
: downloadServer
: splitServerJar
: mergeJars
: deobfMcSRG
Applying SpecialSource ...
Applying exceptor ...
: decompileMc
Error occurred During initialization of VM
Could not reserve enough space for object heap 3145728KB
: FAILED decompileMc
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ': decompileMc.
> Process 'command' C: \ Pylo \ MCreator179 \ jdk \ bin \ java.exe '' finished with non-zero exit value 1
* 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: 10 mins dry 51146
C: \ Pylo \ MCreator179 \ Forge>
Task completed with return code 0 in 655,224 milliseconds