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" uri="" encoding="&#x2713;" method="post" uuid="EF0645B4-838F-11F1-99D2-498A25D43659">
    <field key="username" widget="text" name="username" value="" id="uuid-EF0678B8-838F-11F1-99D2-498A25D43659" attrs="" display="Username"/>
    <field key="password" widget="password" name="password" id="uuid-EF06BEEA-838F-11F1-99D2-498A25D43659" attrs="" display="Password"/>
    <field attrs="" display="Login" id="uuid-EF07076A-838F-11F1-99D2-498A25D43659" value="" name="submit" widget="submit" key="submit"/>
  </form>
</response>