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" uuid="B6A65612-48F4-11F1-9BE5-79F2F8248A5F" method="post" encoding="&#x2713;" uri="">
    <field name="username" widget="text" attrs="" id="uuid-B6A68EAC-48F4-11F1-9BE5-79F2F8248A5F" value="" key="username" display="Username"/>
    <field display="Password" name="password" widget="password" attrs="" id="uuid-B6A6D66E-48F4-11F1-9BE5-79F2F8248A5F" key="password"/>
    <field display="Login" attrs="" widget="submit" name="submit" key="submit" id="uuid-B6A71E08-48F4-11F1-9BE5-79F2F8248A5F" value=""/>
  </form>
</response>