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 uuid="C40ED54A-CC70-11F1-B105-AFA80B50D6CE" uri="" key="login" method="post" encoding="&#x2713;">
    <field attrs="" key="username" display="Username" widget="text" value="" name="username" id="uuid-C40F11FE-CC70-11F1-B105-AFA80B50D6CE"/>
    <field id="uuid-C40F5C04-CC70-11F1-B105-AFA80B50D6CE" name="password" widget="password" attrs="" display="Password" key="password"/>
    <field name="submit" id="uuid-C40FA682-CC70-11F1-B105-AFA80B50D6CE" key="submit" display="Login" attrs="" widget="submit" value=""/>
  </form>
</response>