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 method="post" uri="" key="login" uuid="E86D96C8-CA14-11F1-AEC9-A0402C684F3D" encoding="&#x2713;">
    <field key="username" name="username" id="uuid-E86DD002-CA14-11F1-AEC9-A0402C684F3D" value="" attrs="" display="Username" widget="text"/>
    <field display="Password" id="uuid-E86E147C-CA14-11F1-AEC9-A0402C684F3D" key="password" name="password" attrs="" widget="password"/>
    <field display="Login" name="submit" id="uuid-E86E5FCC-CA14-11F1-AEC9-A0402C684F3D" key="submit" value="" attrs="" widget="submit"/>
  </form>
</response>