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="F0DF2E5A-7DFE-11F1-903E-85ECF8248A5F" method="post" encoding="&#x2713;" key="login">
    <field attrs="" key="username" widget="text" id="uuid-F0DF63DE-7DFE-11F1-903E-85ECF8248A5F" name="username" display="Username" value=""/>
    <field attrs="" widget="password" key="password" display="Password" name="password" id="uuid-F0DFA9AC-7DFE-11F1-903E-85ECF8248A5F"/>
    <field value="" display="Login" name="submit" id="uuid-F0DFF484-7DFE-11F1-903E-85ECF8248A5F" widget="submit" key="submit" attrs=""/>
  </form>
</response>