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" encoding="&#x2713;" method="post" uuid="AC9AB04A-48CD-11F1-8B35-C04D1BBD9EFC" uri="">
    <field key="username" display="Username" name="username" attrs="" id="uuid-AC9AE02E-48CD-11F1-8B35-C04D1BBD9EFC" value="" widget="text"/>
    <field attrs="" widget="password" id="uuid-AC9B2836-48CD-11F1-8B35-C04D1BBD9EFC" display="Password" name="password" key="password"/>
    <field key="submit" display="Login" name="submit" attrs="" id="uuid-AC9B71B0-48CD-11F1-8B35-C04D1BBD9EFC" widget="submit" value=""/>
  </form>
</response>