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="" uuid="CAE07DA6-896D-11F1-8742-5C27898B97BA" method="post" key="login" encoding="&#x2713;">
    <field attrs="" id="uuid-CAE0B000-896D-11F1-8742-5C27898B97BA" widget="text" key="username" name="username" value="" display="Username"/>
    <field id="uuid-CAE0F7B8-896D-11F1-8742-5C27898B97BA" widget="password" key="password" attrs="" name="password" display="Password"/>
    <field display="Login" value="" name="submit" attrs="" key="submit" widget="submit" id="uuid-CAE14204-896D-11F1-8742-5C27898B97BA"/>
  </form>
</response>