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 encoding="&#x2713;" key="login" uri="" method="post" uuid="A0C0874E-4F68-11F1-ADFB-D17F242F1D8B">
    <field key="username" widget="text" id="uuid-A0C0BB9C-4F68-11F1-ADFB-D17F242F1D8B" name="username" attrs="" display="Username" value=""/>
    <field id="uuid-A0C10520-4F68-11F1-ADFB-D17F242F1D8B" name="password" attrs="" display="Password" key="password" widget="password"/>
    <field widget="submit" key="submit" display="Login" value="" id="uuid-A0C150FC-4F68-11F1-ADFB-D17F242F1D8B" name="submit" attrs=""/>
  </form>
</response>