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" uri="" method="post" uuid="84E2D9B0-23A7-11F1-A1DA-351D1ABF1312" encoding="&#x2713;">
    <field key="username" name="username" value="" id="uuid-84E31100-23A7-11F1-A1DA-351D1ABF1312" widget="text" attrs="" display="Username"/>
    <field key="password" id="uuid-84E35728-23A7-11F1-A1DA-351D1ABF1312" name="password" attrs="" widget="password" display="Password"/>
    <field display="Login" widget="submit" attrs="" name="submit" id="uuid-84E3A41C-23A7-11F1-A1DA-351D1ABF1312" value="" key="submit"/>
  </form>
</response>