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;" key="login" uuid="A63C60F4-F495-11F0-87A2-1142C27BCFD7" method="post" uri="">
    <field key="username" widget="text" name="username" display="Username" id="uuid-A63C9510-F495-11F0-87A2-1142C27BCFD7" attrs="" value=""/>
    <field attrs="" id="uuid-A63CDD5E-F495-11F0-87A2-1142C27BCFD7" name="password" display="Password" key="password" widget="password"/>
    <field value="" name="submit" display="Login" widget="submit" key="submit" attrs="" id="uuid-A63D2958-F495-11F0-87A2-1142C27BCFD7"/>
  </form>
</response>