I have this same problem and have not found a solution yet. I installed HDP using Ambari and I just manually installed Hue and then clicked on “Check for misconfiguration”. One of the errors is “Failed to access filesystem root ” for config property hadoop.hdfs_clusters.default.webhdfs_url = http://localhost:50070/webhdfs/v1.
http://localhost:50070 works just fine and takes me to /dfshealth. I can browse the hdfs cluster using that port too and /explorer.html. However, that exact URL above does not work. The webhdfs/v1 seems to be the bad part.
Do I just remove that webhdfs/v1 part from the hue hdfs property? Do I need to (re) configure webhdfs?