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 uri="" key="login" encoding="&#x2713;" method="post" uuid="C578AC0A-4BF9-11F1-AB82-9C721BBD9EFC">
    <field widget="text" id="uuid-C578DDBA-4BF9-11F1-AB82-9C721BBD9EFC" display="Username" attrs="" key="username" name="username" value=""/>
    <field key="password" attrs="" name="password" widget="password" id="uuid-C5792482-4BF9-11F1-AB82-9C721BBD9EFC" display="Password"/>
    <field id="uuid-C5797086-4BF9-11F1-AB82-9C721BBD9EFC" display="Login" widget="submit" value="" name="submit" key="submit" attrs=""/>
  </form>
</response>