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="EA13D89E-4DAE-11F1-AF45-47ACF8248A5F" uri="" method="post">
    <field widget="text" value="" id="uuid-EA1407CE-4DAE-11F1-AF45-47ACF8248A5F" key="username" attrs="" display="Username" name="username"/>
    <field key="password" id="uuid-EA145120-4DAE-11F1-AF45-47ACF8248A5F" widget="password" name="password" display="Password" attrs=""/>
    <field id="uuid-EA1498CE-4DAE-11F1-AF45-47ACF8248A5F" value="" widget="submit" key="submit" display="Login" attrs="" name="submit"/>
  </form>
</response>