Default [Q] ViperOne 6.2.0. Can't add RSS to the BlinkFeed

I'm using ViperOne 6.2.0 on my HTC One (M7). When I try to open link feeds.theguardian.com/theguardian/technology/rss in browser it's opened in BlinkFeed. But BlinkFeed fails with error:
Code:
W/dalvikvm(31889): Exception Ljava/lang/NullPointerException; thrown while initializing Lcom/sun/syndication/feed/synd/SyndFeedImpl;
W/dalvikvm(31889): threadid=21: thread exiting with uncaught exception (group=0x4168c6f8)
E/ActivityManager(  994): App crashed! Process: com.htc.sense.news
E/AndroidRuntime(31889): FATAL EXCEPTION: AsyncTask #1
E/AndroidRuntime(31889): Process: com.htc.sense.news, PID: 31889
E/AndroidRuntime(31889): java.lang.RuntimeException: An error occured while executing doInBackground()
E/AndroidRuntime(31889): 	at android.os.AsyncTask$3.done(AsyncTask.java)
E/AndroidRuntime(31889): 	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
E/AndroidRuntime(31889): 	at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
E/AndroidRuntime(31889): 	at java.util.concurrent.FutureTask.run(FutureTask.java:242)
E/AndroidRuntime(31889): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
E/AndroidRuntime(31889): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
E/AndroidRuntime(31889): 	at java.lang.Thread.run(Thread.java:864)
E/AndroidRuntime(31889): Caused by: java.lang.ExceptionInInitializerError
E/AndroidRuntime(31889): 	at com.sun.syndication.io.SyndFeedInput.build(SyndFeedInput.java)
E/AndroidRuntime(31889): 	at com.htc.socialnetwork.rss.octopus.data.Feed$Parser.convert(Feed.java)
E/AndroidRuntime(31889): 	at com.htc.socialnetwork.rss.octopus.HeadlineListFragment$GetHeadlineTask.getHeadlineFromNetwork(HeadlineListFragment.java)
E/AndroidRuntime(31889): 	at com.htc.socialnetwork.rss.octopus.HeadlineListFragment$GetHeadlineTask.doInBackground(HeadlineListFragment.java)
E/AndroidRuntime(31889): 	at com.htc.socialnetwork.rss.octopus.HeadlineListFragment$GetHeadlineTask.doInBackground(HeadlineListFragment.java)
E/AndroidRuntime(31889): 	at android.os.AsyncTask$2.call(AsyncTask.java)
E/AndroidRuntime(31889): 	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
E/AndroidRuntime(31889): 	... 3 more
E/AndroidRuntime(31889): Caused by: java.lang.NullPointerException: in == null
E/AndroidRuntime(31889): 	at java.util.Properties.load(Properties.java:246)
E/AndroidRuntime(31889): 	at com.sun.syndication.io.impl.PropertiesLoader.<init>(PropertiesLoader.java)
E/AndroidRuntime(31889): 	at com.sun.syndication.io.impl.PropertiesLoader.getPropertiesLoader(PropertiesLoader.java)
E/AndroidRuntime(31889): 	at com.sun.syndication.io.impl.PluginManager.<init>(PluginManager.java)
E/AndroidRuntime(31889): 	at com.sun.syndication.io.impl.PluginManager.<init>(PluginManager.java)
E/AndroidRuntime(31889): 	at com.sun.syndication.feed.synd.impl.Converters.<init>(Converters.java)
E/AndroidRuntime(31889): 	at com.sun.syndication.feed.synd.SyndFeedImpl.<clinit>(SyndFeedImpl.java)
E/AndroidRuntime(31889): 	... 10 more
W/ActivityManager(  994):   Force finishing activity com.htc.launcher/com.htc.socialnetwork.rss.octopus.HeadlineListActivity
How to fix this error?