Compilation of Vaadin themes with Maven

I am trying to compile the style theme of my projects but I always get this error:

[code]
[INFO]
Scanning for projects…
[INFO]

[INFO]

[INFO]
Building testert 1.0-SNAPSHOT
[INFO]

[INFO]

[INFO]
— vaadin-maven-plugin:7.7.6:update-theme (default-cli) @ testert —
[INFO]
Updating theme VAADIN\themes\mytheme
[ERROR]
Updating theme “VAADIN\themes\mytheme” failed
org.codehaus.mojo.gwt.shell.JavaCommandException: Command [[
C:\Program Files\Java\jre1.8.0_121\bin\java -Xmx512m -classpath D:\developer\workspace\testert\src\main\webapp;D:\developer\workspace\testert\target\classes;D:\developer\workspace\testert\src\main\java;C:\Users\leonc.m2\repository\javax\servlet\javax.servlet-api\3.0.1\javax.servlet-api-3.0.1.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-server\7.7.6\vaadin-server-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-sass-compiler\0.9.13\vaadin-sass-compiler-0.9.13.jar;C:\Users\leonc.m2\repository\org\w3c\css\sac\1.3\sac-1.3.jar;C:\Users\leonc.m2\repository\com\vaadin\external\flute\flute\1.3.0.gg2\flute-1.3.0.gg2.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-shared\7.7.6\vaadin-shared-7.7.6.jar;C:\Users\leonc.m2\repository\org\jsoup\jsoup\1.8.3\jsoup-1.8.3.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-push\7.7.6\vaadin-push-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\external\atmosphere\atmosphere-runtime\2.2.9.vaadin2\atmosphere-runtime-2.2.9.vaadin2.jar;C:\Users\leonc.m2\repository\com\vaadin\external\slf4j\vaadin-slf4j-jdk14\1.6.1\vaadin-slf4j-jdk14-1.6.1.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-client-compiled\7.7.6\vaadin-client-compiled-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-themes\7.7.6\vaadin-themes-7.7.6.jar com.vaadin.server.themeutils.SASSAddonImportFileCreator D:\developer\workspace\testert\src\main\webapp\VAADIN\themes\mytheme
]] failed with status -1073740791
at org.codehaus.mojo.gwt.shell.JavaCommand.execute(JavaCommand.java:327)
at com.vaadin.integration.maven.UpdateThemeMojo.processTheme(UpdateThemeMojo.java:45)
at com.vaadin.integration.maven.AbstractThemeMojo.doExecute(AbstractThemeMojo.java:43)
at org.codehaus.mojo.gwt.shell.AbstractGwtShellMojo.execute(AbstractGwtShellMojo.java:182)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[INFO]

[INFO]
BUILD FAILURE
[INFO]

[INFO]
Total time: 2.973 s
[INFO]
Finished at: 2017-01-30T15:39:35-05:00
[INFO]
Final Memory: 13M/168M
[INFO]

[ERROR]
Failed to execute goal com.vaadin:vaadin-maven-plugin:7.7.6:update-theme (default-cli) on project testert: Updating theme “VAADIN\themes\mytheme” failed: Command [[
[ERROR]
C:\Program Files\Java\jre1.8.0_121\bin\java -Xmx512m -classpath D:\developer\workspace\testert\src\main\webapp;D:\developer\workspace\testert\target\classes;D:\developer\workspace\testert\src\main\java;C:\Users\leonc.m2\repository\javax\servlet\javax.servlet-api\3.0.1\javax.servlet-api-3.0.1.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-server\7.7.6\vaadin-server-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-sass-compiler\0.9.13\vaadin-sass-compiler-0.9.13.jar;C:\Users\leonc.m2\repository\org\w3c\css\sac\1.3\sac-1.3.jar;C:\Users\leonc.m2\repository\com\vaadin\external\flute\flute\1.3.0.gg2\flute-1.3.0.gg2.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-shared\7.7.6\vaadin-shared-7.7.6.jar;C:\Users\leonc.m2\repository\org\jsoup\jsoup\1.8.3\jsoup-1.8.3.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-push\7.7.6\vaadin-push-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\external\atmosphere\atmosphere-runtime\2.2.9.vaadin2\atmosphere-runtime-2.2.9.vaadin2.jar;C:\Users\leonc.m2\repository\com\vaadin\external\slf4j\vaadin-slf4j-jdk14\1.6.1\vaadin-slf4j-jdk14-1.6.1.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-client-compiled\7.7.6\vaadin-client-compiled-7.7.6.jar;C:\Users\leonc.m2\repository\com\vaadin\vaadin-themes\7.7.6\vaadin-themes-7.7.6.jar com.vaadin.server.themeutils.SASSAddonImportFileCreator D:\developer\workspace\testert\src\main\webapp\VAADIN\themes\mytheme
[ERROR]
]] failed with status -1073740791
[ERROR]
→ [Help 1]

[ERROR]

[ERROR]
To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR]
Re-run Maven using the -X switch to enable full debug logging.
[ERROR]

[ERROR]
For more information about the errors and possible solutions, please read the following articles:
[ERROR]
[Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[/code]This happens to me with all projects that are new and old.
Someone knows why it does not work and if someone has a solution please tell me.

Is there any other error in the console before this? Did you try to run with -e switch to see full stacktrace.