You've got links to it from your README.md and the top of your git page here: https://github.com/sencha/gxt-demo-edash

Last I checked some of the other samples had the same issue.

Other links that aren't working are the Large Grids example and again this edash demo, linked from this doc page here:

http://docs.sencha.com/gxt/4.x/

mvn install (on Windows 7) fails with something about phantom.js:

btw link "GXT Maven here." in readme file is not correct.

D:\TEST\GXT4_EDASH\gxt-demo-edash-master>mvn install
[INFO] Scanning for projects...
[WARNING] The project com.sencha.gxt:gxt-edash:war:1.0.0-SNAPSHOT uses prerequisites which is only intended for maven-plugin proje
cts but not for non maven-plugin projects. For such purposes you should use the maven-enforcer-plugin. See https://maven.apache.or
g/enforcer/enforcer-rules/requireMavenVersion.html
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] Sencha GXT Executive Dashboard Demo Parent
[INFO] Sencha GXT Executive Dashboard Demo Theme
[INFO] Sencha GXT Executive Dashboard Demo
[INFO] Sencha GXT Executive Dashboard Demo Release Package
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Sencha GXT Executive Dashboard Demo Parent 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ gxt-edash-parent ---
[INFO] Installing D:\TEST\GXT4_EDASH\gxt-demo-edash-master\pom.xml to C:\Users\Blah.m2\repository\com\sencha\gxt\gxt-edash-par
ent\1.0.0-SNAPSHOT\gxt-edash-parent-1.0.0-SNAPSHOT.pom
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Sencha GXT Executive Dashboard Demo Theme 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- phantomjs-maven-plugin:0.7:install (default) @ gxt-theme-edash ---
[INFO]
[INFO] --- build-helper-maven-plugin:1.9.1:add-source (default) @ gxt-theme-edash ---
[INFO] Source directory: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\target\generated-sources added.
[INFO]
[INFO] --- build-helper-maven-plugin:1.9.1:add-resource (default) @ gxt-theme-edash ---
[INFO]
[INFO] --- exec-maven-plugin:1.4.0:java (generate-theme) @ gxt-theme-edash ---
Downloading from codehaus-snapshots: http://nexus.codehaus.org/snapshots/com/sencha/gxt/gxt-themebuilder/4.0.3-SNAPSHOT/maven-meta
data.xml
[WARNING] Could not transfer metadata com.sencha.gxt:gxt-themebuilder:4.0.3-SNAPSHOT/maven-metadata.xml from/to codehaus-snapshots
(http://nexus.codehaus.org/snapshots/): nexus.codehaus.org
Downloading from codehaus-snapshots: http://nexus.codehaus.org/snapshots/com/sencha/gxt/gxt/4.0.3-SNAPSHOT/maven-metadata.xml
[WARNING] Could not transfer metadata com.sencha.gxt:gxt:4.0.3-SNAPSHOT/maven-metadata.xml from/to codehaus-snapshots (http://nexu
s.codehaus.org/snapshots/): nexus.codehaus.org
template generation started
template generation complete
image generation started
generating icons
Win version: 0x1db10106 = 498139398 (Windows Vista)
Using custom image: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\src\main\files\icons\button\toolBarArrow.p
ng
Using custom image: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\src\main\files\icons\grid\collapse.png
Using custom image: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\src\main\files\icons\grid\expand.png
Using custom image: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\src\main\files\icons\menu\checked.png
Using custom image: D:\TEST\GXT4_EDASH\gxt-demo-edash-master\com.sencha.gxt.theme.edash\src\main\files\icons\menu\unchecked.png
image generation complete
compile started
bootstrap class path not set in conjunction with -source 1.7
Error on line -1 in null
compile complete
capture started
loading page D:/TEST/GXT4_EDASH/gxt-demo-edash-master/com.sencha.gxt.theme.edash/target/war/sliceme/index.html
Failed to load page

error with capture
java.lang.RuntimeException: Error with phantomJS:
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:71)
at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrap.callConstructor(ConstructorSite.java:81)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:57)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:232)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:244)
at com.sencha.gxt.themebuilder.ThemeSlicer.capture(ThemeSlicer.groovy:46)
at com.sencha.gxt.themebuilder.ThemeSlicer$capture.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:110)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:114)
at com.sencha.gxt.themebuilder.ThemeBuilder$_main_closure6.doCall(ThemeBuilder.groovy:121)
at com.sencha.gxt.themebuilder.ThemeBuilder$_main_closure6.doCall(ThemeBuilder.groovy)
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.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:114)
at com.sencha.gxt.themebuilder.ThemeBuilder$__clinit__closure10.doCall(ThemeBuilder.groovy:23)
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.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)
at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:914)
at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:897)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:166)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeClosure(ScriptBytecodeAdapter.java:572)
at com.sencha.gxt.themebuilder.ThemeBuilder.main(ThemeBuilder.groovy:119)
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.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:748)