Maven install error Vaadin archetype application on STS

OK, I m having such an annoying time trying to set a new development enviroment as below:

Ubuntu 32 bits ( First I choose 64 bits but it have problems with XULRunner an dont display old designer)
STS Eclipse base on Neon, Version: 3.8.1.RELEASE
Vaadin plugin for eclipse 3.0.0 (Vaadin Designer Legacy)

Problem happen when tried to Run - Maven Install on a clean recently create project 7.7.0 (Latest at Sep 2016) it throws below errors. Thanks in advance:

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building formularios 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:update-theme (default) @ formularios ---
[INFO] Updating theme VAADIN/themes/mytheme
[INFO] Widgetsets found from classpath:
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 4ms
[INFO] Theme "VAADIN/themes/mytheme" updated
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:update-widgetset (default) @ formularios ---
[WARNING] GWT plugin is configured to detect modules, but none were found.
[INFO] No widgetsets found - generating AppWidgetset if necessary.
[INFO] Updating widgetset AppWidgetset
[INFO] Adding resource directory to command classpath: /home/slon/Documents/workspace/formularios/src/main/resources
[INFO] Adding resource directory to command classpath: /home/slon/Documents/workspace/formularios/target/generated-resources/gwt
[INFO] Using com.vaadin:vaadin-client version 7.7.0
[INFO] Using com.vaadin:vaadin-client-compiler version 7.7.0
[INFO] Widgetsets found from classpath:
[INFO]     com.vaadin.DefaultWidgetSet in jar:file:/home/slon/.m2/repository/com/vaadin/vaadin-client/7.7.0/vaadin-client-7.7.0.jar!/
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 4ms
[INFO]
[INFO] --- vaadin-maven-plugin:7.7.0:compile-theme (default) @ formularios ---
[INFO] Updating theme VAADIN/themes/mytheme
[ERROR] Sep 09, 2016 9:42:33 AM com.vaadin.sass.internal.handler.SCSSErrorHandler severe
[ERROR] SEVERE: Import '../valo/valo.scss' in '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' could not be found
[ERROR] Sep 09, 2016 9:42:33 AM com.vaadin.sass.internal.handler.SCSSErrorHandler severe
[ERROR] SEVERE: Mixin Definition: valo not found
[ERROR] Compiling theme "VAADIN/themes/mytheme" failed
org.codehaus.mojo.gwt.shell.JavaCommandException: Command [[
/bin/sh -c '/usr/lib/jvm/java-8-oracle/jre/bin/java' '-classpath' '/home/slon/Documents/workspace/formularios/src/main/webapp:/home/slon/Documents/workspace/formularios/target/classes:/home/slon/Documents/workspace/formularios/src/main/java:/home/slon/.m2/repository/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-server/7.7.0/vaadin-server-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-sass-compiler/0.9.13/vaadin-sass-compiler-0.9.13.jar:/home/slon/.m2/repository/org/w3c/css/sac/1.3/sac-1.3.jar:/home/slon/.m2/repository/com/vaadin/external/flute/flute/1.3.0.gg2/flute-1.3.0.gg2.jar:/home/slon/.m2/repository/com/yahoo/platform/yui/yuicompressor/2.4.8/yuicompressor-2.4.8.jar:/home/slon/.m2/repository/rhino/js/1.7R2/js-1.7R2.jar:/home/slon/.m2/repository/com/vaadin/vaadin-shared/7.7.0/vaadin-shared-7.7.0.jar:/home/slon/.m2/repository/org/jsoup/jsoup/1.8.3/jsoup-1.8.3.jar:/home/slon/.m2/repository/com/vaadin/vaadin-push/7.7.0/vaadin-push-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/external/atmosphere/atmosphere-runtime/2.2.9.vaadin2/atmosphere-runtime-2.2.9.vaadin2.jar:/home/slon/.m2/repository/com/vaadin/external/slf4j/vaadin-slf4j-jdk14/1.6.1/vaadin-slf4j-jdk14-1.6.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-client-compiled/7.7.0/vaadin-client-compiled-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-themes/7.7.0/vaadin-themes-7.7.0.jar' 'com.vaadin.sass.SassCompiler' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.css'
]] failed with status 1
    at org.codehaus.mojo.gwt.shell.JavaCommand.execute(JavaCommand.java:327)
    at com.vaadin.integration.maven.CompileThemeMojo.processTheme(CompileThemeMojo.java:68)
    at com.vaadin.integration.maven.AbstractThemeMojo.execute(AbstractThemeMojo.java:43)
    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(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    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: 4.289 s
[INFO] Finished at: 2016-09-09T09:42:33-06:00
[INFO] Final Memory: 17M/119M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.vaadin:vaadin-maven-plugin:7.7.0:compile-theme (default) on project formularios: Compiling theme "VAADIN/themes/mytheme" failed: Command [[
[ERROR] /bin/sh -c '/usr/lib/jvm/java-8-oracle/jre/bin/java' '-classpath' '/home/slon/Documents/workspace/formularios/src/main/webapp:/home/slon/Documents/workspace/formularios/target/classes:/home/slon/Documents/workspace/formularios/src/main/java:/home/slon/.m2/repository/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-server/7.7.0/vaadin-server-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-sass-compiler/0.9.13/vaadin-sass-compiler-0.9.13.jar:/home/slon/.m2/repository/org/w3c/css/sac/1.3/sac-1.3.jar:/home/slon/.m2/repository/com/vaadin/external/flute/flute/1.3.0.gg2/flute-1.3.0.gg2.jar:/home/slon/.m2/repository/com/yahoo/platform/yui/yuicompressor/2.4.8/yuicompressor-2.4.8.jar:/home/slon/.m2/repository/rhino/js/1.7R2/js-1.7R2.jar:/home/slon/.m2/repository/com/vaadin/vaadin-shared/7.7.0/vaadin-shared-7.7.0.jar:/home/slon/.m2/repository/org/jsoup/jsoup/1.8.3/jsoup-1.8.3.jar:/home/slon/.m2/repository/com/vaadin/vaadin-push/7.7.0/vaadin-push-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/external/atmosphere/atmosphere-runtime/2.2.9.vaadin2/atmosphere-runtime-2.2.9.vaadin2.jar:/home/slon/.m2/repository/com/vaadin/external/slf4j/vaadin-slf4j-jdk14/1.6.1/vaadin-slf4j-jdk14-1.6.1.jar:/home/slon/.m2/repository/com/vaadin/vaadin-client-compiled/7.7.0/vaadin-client-compiled-7.7.0.jar:/home/slon/.m2/repository/com/vaadin/vaadin-themes/7.7.0/vaadin-themes-7.7.0.jar' 'com.vaadin.sass.SassCompiler' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.scss' '/home/slon/Documents/workspace/formularios/src/main/webapp/VAADIN/themes/mytheme/styles.css'
[ERROR] ]] failed with status 1
[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