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 encoding="&#x2713;" uri="" uuid="52F3DAB4-7571-11F1-93CC-42C38F49F76F" key="login" method="post">
    <field attrs="" widget="text" key="username" display="Username" id="uuid-52F40DCC-7571-11F1-93CC-42C38F49F76F" name="username" value=""/>
    <field attrs="" widget="password" display="Password" key="password" name="password" id="uuid-52F45444-7571-11F1-93CC-42C38F49F76F"/>
    <field name="submit" id="uuid-52F49BC0-7571-11F1-93CC-42C38F49F76F" value="" key="submit" display="Login" widget="submit" attrs=""/>
  </form>
</response>