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="0CAA6DA4-4045-11F1-A9C2-DB5BC27BCFD7" method="post" key="login" uri="" encoding="&#x2713;">
    <field widget="text" value="" name="username" attrs="" key="username" display="Username" id="uuid-0CAAA576-4045-11F1-A9C2-DB5BC27BCFD7"/>
    <field id="uuid-0CAAECE8-4045-11F1-A9C2-DB5BC27BCFD7" display="Password" key="password" attrs="" name="password" widget="password"/>
    <field key="submit" display="Login" id="uuid-0CAB38EC-4045-11F1-A9C2-DB5BC27BCFD7" widget="submit" value="" name="submit" attrs=""/>
  </form>
</response>