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="" key="login" encoding="&#x2713;" uuid="E46ABE7E-835C-11F1-B023-60DE25D43659" method="post">
    <field key="username" widget="text" value="" name="username" id="uuid-E46AF0D8-835C-11F1-B023-60DE25D43659" display="Username" attrs=""/>
    <field attrs="" display="Password" id="uuid-E46B37DC-835C-11F1-B023-60DE25D43659" name="password" key="password" widget="password"/>
    <field value="" name="submit" widget="submit" key="submit" display="Login" attrs="" id="uuid-E46B80A2-835C-11F1-B023-60DE25D43659"/>
  </form>
</response>