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;" uuid="C64BF052-8DD5-11F0-87BD-FC0E36923908" method="post" key="login" uri="">
    <field attrs="" id="uuid-C64C2928-8DD5-11F0-87BD-FC0E36923908" key="username" widget="text" display="Username" name="username" value=""/>
    <field key="password" name="password" display="Password" widget="password" attrs="" id="uuid-C64C7126-8DD5-11F0-87BD-FC0E36923908"/>
    <field key="submit" display="Login" widget="submit" name="submit" value="" attrs="" id="uuid-C64CBFD2-8DD5-11F0-87BD-FC0E36923908"/>
  </form>
</response>