Vaadin theme compiler

Hi every one, I have litle problem with compiling “Valo” theme,

[ERROR]
 /home/viter/repo/university/src/main/webapp/VAADIN/themes/valo/styles.scss could not be read!
[ERROR]
 Compiling theme "VAADIN/themes/valo" failed
org.codehaus.mojo.gwt.shell.JavaCommandException: Command [[
/bin/sh -c '/usr/lib/jvm/java-8-oracle/jre/bin/java' '-classpath' '/home/viter/repo/university/src/main/webapp:/home/viter/repo/university/target/classes:/home/viter/repo/university/src/main/java:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-data-jpa/1.4.2.RELEASE/spring-boot-starter-data-jpa-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter/1.4.2.RELEASE/spring-boot-starter-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot/1.4.2.RELEASE/spring-boot-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.4.2.RELEASE/spring-boot-autoconfigure-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.4.2.RELEASE/spring-boot-starter-logging-1.4.2.RELEASE.jar:/home/viter/.m2/repository/ch/qos/logback/logback-classic/1.1.7/logback-classic-1.1.7.jar:/home/viter/.m2/repository/ch/qos/logback/logback-core/1.1.7/logback-core-1.1.7.jar:/home/viter/.m2/repository/org/slf4j/jul-to-slf4j/1.7.21/jul-to-slf4j-1.7.21.jar:/home/viter/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.21/log4j-over-slf4j-1.7.21.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-aop/1.4.2.RELEASE/spring-boot-starter-aop-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-aop/4.3.4.RELEASE/spring-aop-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/aspectj/aspectjweaver/1.8.9/aspectjweaver-1.8.9.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-jdbc/1.4.2.RELEASE/spring-boot-starter-jdbc-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/apache/tomcat/tomcat-jdbc/8.5.6/tomcat-jdbc-8.5.6.jar:/home/viter/.m2/repository/org/apache/tomcat/tomcat-juli/8.5.6/tomcat-juli-8.5.6.jar:/home/viter/.m2/repository/org/springframework/spring-jdbc/4.3.4.RELEASE/spring-jdbc-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/hibernate/hibernate-core/5.0.11.Final/hibernate-core-5.0.11.Final.jar:/home/viter/.m2/repository/org/jboss/logging/jboss-logging/3.3.0.Final/jboss-logging-3.3.0.Final.jar:/home/viter/.m2/repository/org/hibernate/javax/persistence/hibernate-jpa-2.1-api/1.0.0.Final/hibernate-jpa-2.1-api-1.0.0.Final.jar:/home/viter/.m2/repository/org/javassist/javassist/3.20.0-GA/javassist-3.20.0-GA.jar:/home/viter/.m2/repository/antlr/antlr/2.7.7/antlr-2.7.7.jar:/home/viter/.m2/repository/org/jboss/jandex/2.0.0.Final/jandex-2.0.0.Final.jar:/home/viter/.m2/repository/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar:/home/viter/.m2/repository/xml-apis/xml-apis/1.4.01/xml-apis-1.4.01.jar:/home/viter/.m2/repository/org/hibernate/common/hibernate-commons-annotations/5.0.1.Final/hibernate-commons-annotations-5.0.1.Final.jar:/home/viter/.m2/repository/org/hibernate/hibernate-entitymanager/5.0.11.Final/hibernate-entitymanager-5.0.11.Final.jar:/home/viter/.m2/repository/javax/transaction/javax.transaction-api/1.2/javax.transaction-api-1.2.jar:/home/viter/.m2/repository/org/springframework/data/spring-data-jpa/1.10.5.RELEASE/spring-data-jpa-1.10.5.RELEASE.jar:/home/viter/.m2/repository/org/springframework/data/spring-data-commons/1.12.5.RELEASE/spring-data-commons-1.12.5.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-orm/4.3.4.RELEASE/spring-orm-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-context/4.3.4.RELEASE/spring-context-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-expression/4.3.4.RELEASE/spring-expression-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-tx/4.3.4.RELEASE/spring-tx-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/springframework/spring-beans/4.3.4.RELEASE/spring-beans-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.jar:/home/viter/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21.jar:/home/viter/.m2/repository/org/springframework/spring-aspects/4.3.4.RELEASE/spring-aspects-4.3.4.RELEASE.jar:/home/viter/.m2/repository/com/vaadin/vaadin-spring-boot-starter/1.1.0/vaadin-spring-boot-starter-1.1.0.jar:/home/viter/.m2/repository/com/vaadin/vaadin-spring-boot/1.1.0/vaadin-spring-boot-1.1.0.jar:/home/viter/.m2/repository/com/vaadin/vaadin-spring/1.1.0/vaadin-spring-1.1.0.jar:/home/viter/.m2/repository/org/springframework/spring-webmvc/4.3.4.RELEASE/spring-webmvc-4.3.4.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-web/1.4.2.RELEASE/spring-boot-starter-web-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/1.4.2.RELEASE/spring-boot-starter-tomcat-1.4.2.RELEASE.jar:/home/viter/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/8.5.6/tomcat-embed-core-8.5.6.jar:/home/viter/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/8.5.6/tomcat-embed-el-8.5.6.jar:/home/viter/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/8.5.6/tomcat-embed-websocket-8.5.6.jar:/home/viter/.m2/repository/org/hibernate/hibernate-validator/5.2.4.Final/hibernate-validator-5.2.4.Final.jar:/home/viter/.m2/repository/javax/validation/validation-api/1.1.0.Final/validation-api-1.1.0.Final.jar:/home/viter/.m2/repository/com/fasterxml/classmate/1.3.3/classmate-1.3.3.jar:/home/viter/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.8.4/jackson-databind-2.8.4.jar:/home/viter/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.8.4/jackson-annotations-2.8.4.jar:/home/viter/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.8.4/jackson-core-2.8.4.jar:/home/viter/.m2/repository/org/springframework/spring-web/4.3.4.RELEASE/spring-web-4.3.4.RELEASE.jar:/home/viter/.m2/repository/com/vaadin/vaadin-themes/7.7.3/vaadin-themes-7.7.3.jar:/home/viter/.m2/repository/org/springframework/spring-core/4.3.4.RELEASE/spring-core-4.3.4.RELEASE.jar:/home/viter/.m2/repository/com/vaadin/addon/vaadin-context-menu/0.7.4/vaadin-context-menu-0.7.4.jar:/home/viter/.m2/repository/com/vaadin/vaadin-server/7.7.3/vaadin-server-7.7.3.jar:/home/viter/.m2/repository/com/vaadin/vaadin-shared/7.7.3/vaadin-shared-7.7.3.jar:/home/viter/.m2/repository/org/jsoup/jsoup/1.8.3/jsoup-1.8.3.jar:/home/viter/.m2/repository/com/vaadin/vaadin-client-compiled/7.7.3/vaadin-client-compiled-7.7.3.jar:/home/viter/.m2/repository/com/vaadin/vaadin-client-compiler/7.7.3/vaadin-client-compiler-7.7.3.jar:/home/viter/.m2/repository/com/vaadin/vaadin-client/7.7.3/vaadin-client-7.7.3.jar:/home/viter/.m2/repository/com/vaadin/external/gwt/gwt-elemental/2.7.0.vaadin4/gwt-elemental-2.7.0.vaadin4.jar:/home/viter/.m2/repository/com/vaadin/external/gwt/gwt-user/2.7.0.vaadin4/gwt-user-2.7.0.vaadin4.jar:/home/viter/.m2/repository/javax/validation/validation-api/1.0.0.GA/validation-api-1.0.0.GA-sources.jar:/home/viter/.m2/repository/com/vaadin/external/gwt/gwt-dev/2.7.0.vaadin4/gwt-dev-2.7.0.vaadin4.jar:/home/viter/.m2/repository/org/ow2/asm/asm/5.0.3/asm-5.0.3.jar:/home/viter/.m2/repository/org/ow2/asm/asm-util/5.0.3/asm-util-5.0.3.jar:/home/viter/.m2/repository/org/ow2/asm/asm-tree/5.0.3/asm-tree-5.0.3.jar:/home/viter/.m2/repository/org/ow2/asm/asm-commons/5.0.3/asm-commons-5.0.3.jar:/home/viter/.m2/repository/com/vaadin/vaadin-sass-compiler/0.9.13/vaadin-sass-compiler-0.9.13.jar:/home/viter/.m2/repository/org/w3c/css/sac/1.3/sac-1.3.jar:/home/viter/.m2/repository/com/vaadin/external/flute/flute/1.3.0.gg2/flute-1.3.0.gg2.jar:/home/viter/.m2/repository/com/yahoo/platform/yui/yuicompressor/2.4.8/yuicompressor-2.4.8.jar:/home/viter/.m2/repository/rhino/js/1.7R2/js-1.7R2.jar' 'com.vaadin.sass.SassCompiler' '/home/viter/repo/university/src/main/webapp/VAADIN/themes/valo/styles.scss' '/home/viter/repo/university/src/main/webapp/VAADIN/themes/valo/styles.css'
]] failed with status 

Code of my pom.xml

<dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-client-compiler</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.eclipse.jetty</groupId>
                    <artifactId>jetty-servlets</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.eclipse.jetty</groupId>
                    <artifactId>jetty-annotations</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.eclipse.jetty</groupId>
                    <artifactId>jetty-util</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

<plugin>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <version>${vaadin.version}</version>
                <configuration>
                    <extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>
                    <webappDirectory>${basedir}/target/classes/VAADIN/widgetsets</webappDirectory>
                    <draftCompile>false</draftCompile>
                    <compileReport>false</compileReport>
                    <style>OBF</style>
                    <strict>true</strict>
                    <modules>
                        <module>DashboardWidgetSet</module>
                    </modules>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>clean</goal>
                            <goal>resources</goal>
                            <goal>update-theme</goal>
                            <goal>update-widgetset</goal>
                            <goal>compile-theme</goal>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

After removing /webapp/vaadin folder, all work.