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 encoding="&#x2713;" uri="" method="post" uuid="63DD84A0-9215-11F0-9CCC-B20B36923908" key="login">
    <field value="" attrs="" key="username" widget="text" id="uuid-63DDBBD2-9215-11F0-9CCC-B20B36923908" display="Username" name="username"/>
    <field name="password" id="uuid-63DE052E-9215-11F0-9CCC-B20B36923908" display="Password" key="password" attrs="" widget="password"/>
    <field name="submit" id="uuid-63DE4DCC-9215-11F0-9CCC-B20B36923908" display="Login" key="submit" attrs="" widget="submit" value=""/>
  </form>
</response>