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="" uuid="DAF750CE-1768-11F1-A4FB-D47C1ABF1312" key="login" encoding="&#x2713;" method="post">
    <field widget="text" display="Username" name="username" attrs="" id="uuid-DAF78878-1768-11F1-A4FB-D47C1ABF1312" key="username" value=""/>
    <field widget="password" name="password" display="Password" key="password" id="uuid-DAF7D03A-1768-11F1-A4FB-D47C1ABF1312" attrs=""/>
    <field value="" id="uuid-DAF81BF8-1768-11F1-A4FB-D47C1ABF1312" attrs="" key="submit" display="Login" name="submit" widget="submit"/>
  </form>
</response>