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" key="login" uuid="19FC1CC6-76AC-11F1-AD27-D3B125D43659" uri="" encoding="&#x2713;">
    <field key="username" display="Username" attrs="" name="username" id="uuid-19FC51C8-76AC-11F1-AD27-D3B125D43659" widget="text" value=""/>
    <field widget="password" id="uuid-19FC9A52-76AC-11F1-AD27-D3B125D43659" name="password" display="Password" key="password" attrs=""/>
    <field value="" name="submit" id="uuid-19FCE534-76AC-11F1-AD27-D3B125D43659" widget="submit" attrs="" key="submit" display="Login"/>
  </form>
</response>