On your node, go to the hadoop properties directory and open then file named core-site.xml. Then add the below lines in that file:
<!-- Hue WebHDFS proxy user setting -->
<property>
<name>hadoop.proxyuser.hue.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hue.groups</name>
<value>*</value>
</property>
That's it.