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 key="login" method="post" uuid="A8D15BDE-7D71-11F1-AFBA-56B3F8248A5F" encoding="&#x2713;" uri="">
    <field value="" id="uuid-A8D18CD0-7D71-11F1-AFBA-56B3F8248A5F" name="username" display="Username" key="username" widget="text" attrs=""/>
    <field widget="password" key="password" attrs="" display="Password" name="password" id="uuid-A8D1D2A8-7D71-11F1-AFBA-56B3F8248A5F"/>
    <field attrs="" widget="submit" key="submit" display="Login" id="uuid-A8D21EAC-7D71-11F1-AFBA-56B3F8248A5F" name="submit" value=""/>
  </form>
</response>