XSLT Error

Empty filename at /home/ubuntu/perl5/perlbrew/perls/perl-5.18.0/lib/site_perl/5.18.0/Chameleon5/Template/XSLT.pm line 575.

Response XML

<?xml version="1.0"?>
<response>
  <form key="login" uuid="8E93D1A0-97D2-11F0-858D-23EC455C7DD5" encoding="&#x2713;" method="post" uri="">
    <field widget="text" key="username" id="uuid-8E9403C8-97D2-11F0-858D-23EC455C7DD5" value="" name="username" display="Username" attrs=""/>
    <field display="Password" attrs="" name="password" key="password" id="uuid-8E944B26-97D2-11F0-858D-23EC455C7DD5" widget="password"/>
    <field id="uuid-8E9491DA-97D2-11F0-858D-23EC455C7DD5" key="submit" widget="submit" attrs="" display="Login" name="submit" value=""/>
  </form>
</response>