MCreator 1.6.6 can't connect to server

I was creating a mod while a 'Cannot connect to the Pylo server.' message popped up.

Log:

BOOTING UP GRADLE...
Data loaded, MCreator gradle console ready [ver 1.007]! [boot took 1 milliseconds]
RIGHT click once to copy log to the clipboard or twice to clear the log.
   
Executing gradle command: clean build
Microsoft Windows [Wersja 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Wszelkie prawa zastrzeľone.
C:\Pylo\MCreator166>cd forge
C:\Pylo\MCreator166\forge>SET "JAVA_HOME=C:\Pylo\MCreator166\jdk32\"
C:\Pylo\MCreator166\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Pylo\MCreator166\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Pylo\MCreator166\forge>SET "JAVA_OPTS=-Xmx1024m -Xms512m"
C:\Pylo\MCreator166\forge>gradlew clean build
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 org.ow2.asm:asm-debug-all:5.0.3.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve org.ow2.asm:asm-debug-all:5.0.3.
         > Could not get resource 'https://jcenter.bintray.com/org/ow2/asm/asm-debug-all/5.0.3/asm-debug-all-5.0.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/org/ow2/asm/asm-debug-all/5.0.3/asm-debug-all-5.0.3.pom'.
               > peer not authenticated
   > Could not resolve com.google.guava:guava:18.0.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve com.google.guava:guava:18.0.
         > Could not get resource 'https://jcenter.bintray.com/com/google/guava/guava/18.0/guava-18.0.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/google/guava/guava/18.0/guava-18.0.pom'.
               > peer not authenticated
   > Could not resolve com.cloudbees:diff4j:1.1.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve com.cloudbees:diff4j:1.1.
         > Could not get resource 'https://jcenter.bintray.com/com/cloudbees/diff4j/1.1/diff4j-1.1.pom'.
BUILD FAILED
            > Could not GET 'https://jcenter.bintray.com/com/cloudbees/diff4j/1.1/diff               > peer not authenticated
4j-1.1.pom'.
Total time: 11.578 secs
   > Could not resolve com.github.abrarsyed.jastyle:jAstyle:1.3.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve com.github.abrarsyed.jastyle:jAstyle:1.3.
         > Could not get resource 'https://jcenter.bintray.com/com/github/abrarsyed/jastyle/jAstyle/1.3/jAstyle-1.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/github/abrarsyed/jastyle/jAstyle/1.3/jAstyle-1.3.pom'.
               > peer not authenticated
   > Could not resolve net.sf.trove4j:trove4j:2.1.0.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve net.sf.trove4j:trove4j:2.1.0.
         > Could not get resource 'https://jcenter.bintray.com/net/sf/trove4j/trove4j/2.1.0/trove4j-2.1.0.pom'.
            > Could not GET 'https://jcenter.bintray.com/net/sf/trove4j/trove4j/2.1.0/trove4j-2.1.0.pom'.
               > peer not authenticated
   > Could not resolve com.google.code.gson:gson:2.2.4.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve com.google.code.gson:gson:2.2.4.
         > Could not get resource 'https://jcenter.bintray.com/com/google/code/gson/gson/2.2.4/gson-2.2.4.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/google/code/gson/gson/2.2.4/gson-2.2.4.pom'.
               > peer not authenticated
   > Could not resolve com.github.tony19:named-regexp:0.2.3.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve com.github.tony19:named-regexp:0.2.3.
         > Could not get resource 'https://jcenter.bintray.com/com/github/tony19/named-regexp/0.2.3/named-regexp-0.2.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/github/tony19/named-regexp/0.2.3/named-regexp-0.2.3.pom'.
               > peer not authenticated
   > Could not resolve org.apache.httpcomponents:httpclient:4.3.3.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve org.apache.httpcomponents:httpclient:4.3.3.
         > Could not get resource 'https://jcenter.bintray.com/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.pom'.
               > peer not authenticated
   > Could not resolve org.apache.httpcomponents:httpmime:4.3.3.
     Required by:
         :forge:unspecified > net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT
      > Could not resolve org.apache.httpcomponents:httpmime:4.3.3.
         > Could not get resource 'https://jcenter.bintray.com/org/apache/httpcomponents/httpmime/4.3.3/httpmime-4.3.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/org/apache/httpcomponents/httpmime/4.3.3/httpmime-4.3.3.pom'.
               > peer not authenticated
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
C:\Pylo\MCreator166\forge>
Task completed with return code 0 in 16309 milliseconds

I really need help with this!