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="F313478C-17CA-11F1-95FC-BA29802D798A" method="post" key="login" uri="" encoding="&#x2713;">
    <field value="" key="username" id="uuid-F3138274-17CA-11F1-95FC-BA29802D798A" display="Username" name="username" widget="text" attrs=""/>
    <field id="uuid-F313CF90-17CA-11F1-95FC-BA29802D798A" key="password" widget="password" attrs="" name="password" display="Password"/>
    <field name="submit" display="Login" widget="submit" attrs="" value="" key="submit" id="uuid-F3141F2C-17CA-11F1-95FC-BA29802D798A"/>
  </form>
</response>