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="C85D0DA6-88E6-11F1-A1A8-FFF225D43659" uri="" encoding="&#x2713;" method="post" key="login">
    <field value="" display="Username" widget="text" id="uuid-C85D3D58-88E6-11F1-A1A8-FFF225D43659" name="username" key="username" attrs=""/>
    <field widget="password" attrs="" key="password" id="uuid-C85D84D4-88E6-11F1-A1A8-FFF225D43659" name="password" display="Password"/>
    <field id="uuid-C85DCF5C-88E6-11F1-A1A8-FFF225D43659" name="submit" attrs="" key="submit" widget="submit" display="Login" value=""/>
  </form>
</response>