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 method="post" uri="" uuid="099C2DCE-7A65-11F0-AA5E-E165160DF820" encoding="&#x2713;" key="login">
    <field key="username" display="Username" widget="text" value="" id="uuid-099C5E8E-7A65-11F0-AA5E-E165160DF820" attrs="" name="username"/>
    <field id="uuid-099CA70E-7A65-11F0-AA5E-E165160DF820" widget="password" name="password" attrs="" key="password" display="Password"/>
    <field attrs="" name="submit" id="uuid-099CEFD4-7A65-11F0-AA5E-E165160DF820" widget="submit" value="" display="Login" key="submit"/>
  </form>
</response>