Build failed in MCreator 1.7.3

So I downloaded the 1.7.3 (Minecraft 1.7.10)  Mcreator, but every time I try to export my work or start a test It crashs. Can someone help me? 

This was in the console:

Executing gradle command: runClient
Microsoft Windows [Version 10.0.19044.1706]
(c) Microsoft Corporation. Minden jog fenntartva.
C:\Users\Rendszergazda>cd forge
C:\Users\Rendszergazda\forge>SET "JAVA_HOME=C:\Users\Rendszergazda\jdk64\"
C:\Users\Rendszergazda\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Users\Rendszergazda\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Users\Rendszergazda\forge>gradlew -Dorg.gradle.jvmargs="-Xms128m -Xmx7062m" runClient
To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: http://gradle.org/docs/2.0/userguide/gradle_daemon.html.
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'forge'.
> Could not resolve all dependencies for configuration ':classpath'.
> Could not resolve net.minecraftforge.gradle:ForgeGradle:1.2-SNAPSHOT.
     Required by:
         :forge:unspecified
> Unable to load Maven meta-data from http://repo1.maven.org/maven2/net/minecraftforge/gradle/ForgeGradle/1.2….
> Could not GET 'http://repo1.maven.org/maven2/net/minecraftforge/gradle/ForgeGradle/1.2…
> Unable to load Maven meta-data from http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGr….
> Could not GET 'http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGr…'.
> peer not authenticated
* 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: 11.506 secs
C:\Users\Rendszergazda\forge>
Task completed with return code 0 in 12002 milliseconds

Sorry if It's easy. I really don't understand this code things.