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="" encoding="&#x2713;" method="post" key="login" uuid="1C4E07B4-4D85-11F1-81A2-F0858F49F76F">
    <field key="username" display="Username" id="uuid-1C4E3CDE-4D85-11F1-81A2-F0858F49F76F" name="username" attrs="" widget="text" value=""/>
    <field id="uuid-1C4E8900-4D85-11F1-81A2-F0858F49F76F" display="Password" name="password" attrs="" key="password" widget="password"/>
    <field attrs="" name="submit" display="Login" id="uuid-1C4ED43C-4D85-11F1-81A2-F0858F49F76F" key="submit" value="" widget="submit"/>
  </form>
</response>