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" uuid="DF8308F2-2C5F-11F1-9E3C-2F86C27BCFD7" method="post" encoding="&#x2713;">
    <field widget="text" value="" id="uuid-DF833E4E-2C5F-11F1-9E3C-2F86C27BCFD7" attrs="" name="username" display="Username" key="username"/>
    <field widget="password" id="uuid-DF8383F4-2C5F-11F1-9E3C-2F86C27BCFD7" attrs="" display="Password" name="password" key="password"/>
    <field attrs="" name="submit" display="Login" key="submit" value="" id="uuid-DF83C9EA-2C5F-11F1-9E3C-2F86C27BCFD7" widget="submit"/>
  </form>
</response>