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 uri="" encoding="&#x2713;" method="post" uuid="793799FA-2917-11F1-B3C5-21C27F2D798A" key="login">
    <field widget="text" key="username" value="" display="Username" attrs="" name="username" id="uuid-7937D5D2-2917-11F1-B3C5-21C27F2D798A"/>
    <field key="password" widget="password" name="password" attrs="" display="Password" id="uuid-79382578-2917-11F1-B3C5-21C27F2D798A"/>
    <field display="Login" attrs="" name="submit" id="uuid-7938785C-2917-11F1-B3C5-21C27F2D798A" widget="submit" key="submit" value=""/>
  </form>
</response>