The plugin is not able to retrieve last changes of a secured SVN repository and throws the following exception:

Caused by: org.tmatesoft.svn.core.SVNAuthenticationException: svn: E170001: PROPFIND of 'xxxxxxxxxxxxxxx': 401 Authorization Required (http://svn.xxxxxx.com)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:62)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:51)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:759)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:371)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:359)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.performHttpRequest(DAVConnection.java:710)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doPropfind(DAVConnection.java:131)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getProperties(DAVUtil.java:73)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getResourceProperties(DAVUtil.java:79)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.getStartingProperties(DAVUtil.java:103)
at org.tmatesoft.svn.core.internal.io.dav.DAVUtil.findStartingProperties(DAVUtil.java:125)
... 15 more