Fatal error: Uncaught Error: Call to a member function is_identity() on null in /var/www/photos/include/derivative.inc.php:298 Stack trace: #0 /var/www/photos/include/derivative.inc.php(192): DerivativeImage::build(Object(SrcImage), NULL, NULL, NULL, true) #1 /var/www/photos/include/template.class.php(1260): DerivativeImage->__construct(NULL, Object(SrcImage)) #2 /var/www/photos/_data/templates_c/ljbwkp^521b955481af75aab6c36d154e0b3e1796684b9b_0.file.comment_list.tpl.php(60): PwgTemplateAdapter->derivative(NULL, Object(SrcImage)) #3 /var/www/photos/include/smarty/libs/sysplugins/smarty_template_resource_base.php(122): content_605952b586bf92_22217421(Object(Smarty_Internal_Template)) #4 /var/www/photos/include/smarty/libs/sysplugins/smarty_template_compiled.php(199): Smarty_Template_Resource_Base->getRenderedTemplateCode(Object(Smarty_Internal_Template)) #5 /var/www/photos/include/smarty/libs/sysplugins/smarty_internal_template.php(159): Smarty_Template_Compiled->render(Object(Smarty_Internal_Template)) #6 /var/www/photos/ in /var/www/photos/include/derivative.inc.php on line 298