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Vaadin 8: Widgetset not compiling com.vaadin.terminal.gwt.DefaultWidgetSet not found in project

I am trying to implement a Vaadin 8 framework project (8.0.5) but I can't get the widgetset to compile.
Using Glassfish 4 (alternatively, tried on Wildfly) DB: ObjectDB. I do have the charts and Timeline addon (Licensed). Theme compiles fine, using eclipse Vaadin plugin. WAR deploys fine.
After bringing up glassfish, tried accessing the UI - MyAppWidgetset.nocache.js not found error.
At this point tried compiling the widgetset Build failure with error com.vaadin.terminal.gwt.DefaultWidgetSet not found in project.
pom.xml reflects the same error at <execution> element.
Tried the fowllowing:
Added: #WidgetSet annotation to the MainUI class. Then added a gwt.xml class in ../resources/{package-folder structure} found on Vaadin forum:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 1.7.0//EN" "http://google-web-toolkit.googlecode.com/svn/tags/1.7.0/distro-source/core/src/gwt-module.dtd">
<module>
<inherits name="com.vaadin.addon.charts.Widgetset" />
<inherits name="com.vaadin.addon.timeline.gwt.TimelineWidgetSet" />
<inherits name="com.vaadin.DefaultWidgetSet" />
</module>
I manually tried adding:
<inherits name="com.vaadin.terminal.gwt.DefaultWidgetSet" />
But as soon as I save, Eclipse editor deletes that row. Is that supposed to happen? Tried adding from an external editor, but it gets deleted as soon as I open it in Eclipse.
After selectivly adding dependencies, the problem seems to be with charts.
Apparently, Adding Vaadin Charts dependency is causing the compilation to fail.
But I do have the license key in my root folder.
<dependency>
<groupId>com.vaadin.addon</groupId>
<artifactId>vaadin-charts</artifactId>
<version>2.0.0</version>
</dependency>

So I was doing 2 things wrong:
The location of the license file. A per the Demo code on github, it was in the root folder of the project. It has to be under \Users\(username) Directory.
Vaadin 8 works with Charts 4.0 and not earlier versions.

Error inheriting a module in a mavenized GWT project

After adding this dependency in my pom.xml:
<dependency>
<groupId>com.eaio.uuid</groupId>
<artifactId>uuid</artifactId>
<version>3.2</version>
</dependency>
I get an error by jetty on the module load event:
no source code available for com.eaio.uuid; did you forget to inherit the module? unable to find com.client.myproject..`
What am I missing?

If you're using any of the classes in that artifact in your GWT compiled code, then the source code needs to be available, either packaged in the jar or as a source jar (remember that's another dependency).
You'll have to look for a .gwt.xml file in the jar, as this will be the name you need to inherit in your own GWT descriptor, eg. if the file is called com/eaio/UUID.gwt.xml you should
...
<inherits name="com.eaio.UUID" />
...
If one isn't available, just create your own with a simple <source path="..." /> and stick in the right package in your own project (still provided the source is actually available!)
Cheers,

GWT JS *.nocache.js not generated

I'm trying to compile my gwt application. I'm having a parent project 'admin' and a maven module 'admin-app' with my web.xml *.gwt.xml admin.html.
Looks like:
admin package = com.admin
admin-app
src/main/resources
package=com.admin file=admin.gwt.xml
src/main/webapp
++ js
++ admin.css
++ admin.html
++ WEB-INF
+++ jsp
+++ lib
+++ applicationContextx.xml
+++ web.xml
The problem is my entry point or my paths and defaults names.
I included
<script type="text/javascript" src="admin/admin.nocache.js"></script>
To to generate the JS code for my application.
But My problem is within my *gwt.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module SYSTEM "gwt-module.dtd">
<module rename-to='admin'>
<inherits name='com.google.gwt.user.User'/>
<!-- Specify the app entry point class. -->
<entry-point class='com.admin.client.AdminEntryPoint'/>
<source path='client'/>
</module>
My entry path is correct but I always get the error msg:
Loading modules
com.admin.admin
Loading inherited module 'com.admin.admin'
[ERROR] Unable to find 'com/admin/admin.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?
[ERROR] shell failed in doStartup method
Without the entry point I can successfully compile my project, so the problem is within the entry-point.
thx for any help :)

I fixed this problem by renaming the module to app like the project-module, the *.gwt.xml to app.gwt.xml and also the path in my admin-html to app/app.nocache.xml. It's running know but the main idea was to use another namespace. So if anybody can help me there i would be very happy.
app should be named admin, for easier searching and so on.
thx :)

Why GWT Linker Cross-Site-Iframe Ignoring the script tags in the gwt.xml?

Why gwt-recaptcha-1.0.0.Beta2.jar blocks script tags in recaptcha jar while linking modules?
In my web application using GWT, I am using captcha verification. For using captcha I used Claudius Hauptmann's gwt-recaptcha-1.0.0.Beta2.jar. In the gwt.xml file of this jar there is a script configuration as follows:
<module>
<inherits name="com.google.gwt.user.User"/>
<script src="https://www.google.com/recaptcha/api/js/recaptcha_ajax.js"/>
</module>
When I run the project it ignores loading the scripts by giving these messages in console:
Linking modules
Bootstrap link for command-line module 'com.web.Ask'
Linking module 'ask'
Invoking Linker Cross-Site-Iframe
Ignoring the following script tags in the gwt.xml file
https://www.google.com/recaptcha/api/js/recaptcha_ajax.js
raphael.js
I would like to know what is the exact reason for ignoring these file. How to resolve it.
PS: before some days it was working perfectly and after some config changes it stopped.

I am not sure about this fix,
please try
Remove linker elements from your GWT module XML like
<add-linker name="xsiframe" />
<set-configuration-property name='xsiframe.failIfScriptTag' value='FALSE' />

Eclipse GWT "There are no CSS files referenced"

I am using Eclipse Juno Service Release 1, instaled the latest GWT Designer plugin and run update. When I am in GWT Design and I select the CSS button in the StyleName row of a widget's properties I get the message "There are no CSS files referenced from module or HTML".
My gwt.xml is:
<module>
<inherits name="com.google.gwt.user.User"/>
<inherits name="com.google.gwt.user.theme.standard.Standard"/>
<entry-point class="org.AwardTracker.client.AwardTracker"/>
<stylesheet src="org.AwardTracker.AwardTracker.css"/>
<!-- servelet context - path is arbitrary, but must match up with the rpc init inside java class -->
<!-- Tomcat will listen for this from the server and waits for rpc request in this context -->
<servlet class="org.AwardTracker.server.MySQLConnection" path="/MySQLConnection" />
<inherits name="com.google.gwt.user.theme.standard.Standard"/>
<inherits name="com.google.gwt.user.theme.chrome.Chrome"/>
<inherits name="com.google.gwt.user.theme.dark.Dark"/>
</module>
My CSS is in org.AwardTracker (directly above the gwt.xml file).
All the hints that I have googled have been to update GWT Designer. These hints are all several years old and I have the latest version.
Any idea what I am doing wrong?

You have to first chk your css file in war folder bcoz css file and html file exist in war folder than check link in html file
<link type="text/css" rel="stylesheet" href="abc.css">

You need to have your project packages and references correct. You can follow the solution offered here regarding project/file organization - Editing CSS in Gwt WindowBuilder

It seems the file is not found due to the path.You are already in The xml file so try
<stylesheet src="AwardTracker.css"/>
Hope this will helpfull .