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 method="post" uri="" uuid="9208A2B4-7DBB-11F1-922E-A44E242F1D8B" key="login" encoding="&#x2713;">
    <field attrs="" key="username" id="uuid-9208E2C4-7DBB-11F1-922E-A44E242F1D8B" display="Username" widget="text" value="" name="username"/>
    <field name="password" display="Password" id="uuid-92092B3A-7DBB-11F1-922E-A44E242F1D8B" widget="password" key="password" attrs=""/>
    <field attrs="" key="submit" id="uuid-92097A5E-7DBB-11F1-922E-A44E242F1D8B" display="Login" value="" widget="submit" name="submit"/>
  </form>
</response>