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" method="post" encoding="&#x2713;" uri="" uuid="F0C1FDF4-88B6-11F1-9E11-D7DE25D43659">
    <field attrs="" key="username" name="username" id="uuid-F0C22CAC-88B6-11F1-9E11-D7DE25D43659" widget="text" display="Username" value=""/>
    <field display="Password" widget="password" attrs="" key="password" id="uuid-F0C275D6-88B6-11F1-9E11-D7DE25D43659" name="password"/>
    <field key="submit" attrs="" id="uuid-F0C2C180-88B6-11F1-9E11-D7DE25D43659" name="submit" widget="submit" display="Login" value=""/>
  </form>
</response>