HelloWorld: problems with install


After installing the SDK when trying to build the HellowWorld example I encounter following errors:

[INFO] Scanning for projects…
Downloading: http://repo.maven.apache.org/maven2/org/apache/felix/maven-bundle-plugin/2.4.0/maven-bundle-plugin-2.4.0.pom
[ERROR] The build could not read 1 project → [Help 1]
[ERROR] The project com.ur.urcap.examples:helloworld:1.0-SNAPSHOT (/home/ur/URCapSDK/samples/html/com.ur.urcap.examples.helloworld/pom.xml) has 2 errors
[ERROR] Unresolveable build extension: Plugin org.apache.felix:maven-bundle-plugin:2.4.0 or one of its dependencies could not be resolved: Failed to collect dependencies for org.apache.felix:maven-bundle-plugin:jar:2.4.0 (): Failed to read artifact descriptor for org.apache.felix:maven-bundle-plugin:jar:2.4.0: Could not transfer artifact org.apache.felix:maven-bundle-plugin:pom:2.4.0 from/to central (http://repo.maven.apache.org/maven2): Failed to transfer file: http://repo.maven.apache.org/maven2/org/apache/felix/maven-bundle-plugin/2.4.0/maven-bundle-plugin-2.4.0.pom. Return code is: 501 , ReasonPhrase:HTTPS Required. → [Help 2]
[ERROR] Unknown packaging: bundle @ line 12, column 13
[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] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildi

How can I solve this?

Kind regards