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="" key="login" encoding="&#x2713;" method="post" uuid="26AB0678-2FC4-11F1-B1F7-76801ABF1312">
    <field widget="text" value="" display="Username" id="uuid-26AB377E-2FC4-11F1-B1F7-76801ABF1312" key="username" attrs="" name="username"/>
    <field name="password" attrs="" key="password" id="uuid-26AB7F18-2FC4-11F1-B1F7-76801ABF1312" display="Password" widget="password"/>
    <field id="uuid-26ABCA36-2FC4-11F1-B1F7-76801ABF1312" widget="submit" display="Login" value="" name="submit" key="submit" attrs=""/>
  </form>
</response>