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="" encoding="&#x2713;" uuid="4637D98C-6A4B-11F1-98BE-71B925D43659" key="login" method="post">
    <field widget="text" key="username" attrs="" display="Username" name="username" id="uuid-4637F48A-6A4B-11F1-98BE-71B925D43659" value=""/>
    <field id="uuid-4638110E-6A4B-11F1-98BE-71B925D43659" key="password" widget="password" attrs="" display="Password" name="password"/>
    <field display="Login" attrs="" name="submit" widget="submit" key="submit" value="" id="uuid-46382DB0-6A4B-11F1-98BE-71B925D43659"/>
  </form>
</response>