Unable to add secured projects

Unable to add a secured project even with the right credentials:

org.apache.maven.continuum.ContinuumException: Error reading POM
at org.apache.maven.continuum.web.action.AddMavenTwoProjectAction.doExecute(AddMavenTwoProjectAction.java:151)
at org.apache.maven.continuum.web.action.AddMavenProjectAction.execute(AddMavenProjectAction.java:189)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
at org.apache.struts2.interceptor.BackgroundProcess$1.run(BackgroundProcess.java:56)
at java.lang.Thread.run(Thread.java:613)
Caused by: java.net.ProtocolException: Server redirected too many times (20)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1180)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:234)
at java.net.URL.openStream(URL.java:1007)
at org.apache.maven.continuum.web.action.AddMavenTwoProjectAction.doExecute(AddMavenTwoProjectAction.java:127)
... 9 more