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 uuid="70ABE25E-500F-11F1-9324-84F425D43659" method="post" uri="" key="login" encoding="&#x2713;">
    <field display="Username" widget="text" value="" key="username" attrs="" id="uuid-70AC17B0-500F-11F1-9324-84F425D43659" name="username"/>
    <field name="password" attrs="" key="password" id="uuid-70AC6238-500F-11F1-9324-84F425D43659" display="Password" widget="password"/>
    <field name="submit" id="uuid-70ACB080-500F-11F1-9324-84F425D43659" key="submit" attrs="" value="" widget="submit" display="Login"/>
  </form>
</response>