Exception: Invalid compiled template for 'pages.tpl'

#0 /home/agupvarn/visit.varna.bg/classes/phpCoreLib2/Web/TemplateEngine/DSmarty.php(95): Smarty_Internal_TemplateBase->fetch('pages.tpl', NULL, NULL, NULL, false, true, false)
#1 /home/agupvarn/visit.varna.bg/classes/pages.php(268): DSmarty->fetch('pages.tpl')
#2 /home/agupvarn/visit.varna.bg/classes/_libs/DUserFormAction.php(91): DStaticPages->_formAction()
#3 /home/agupvarn/visit.varna.bg/classes/_libs/DUserFormAction.php(131): DUserFormAction->onScreen()
#4 /home/agupvarn/visit.varna.bg/classes/phpCoreLib2/Web/MVC/DController.php(221): DUserFormAction->run()
#5 /home/agupvarn/visit.varna.bg/classes/phpCoreLib2/Web/MVC/DController.php(112): DController->handleData()
#6 /home/agupvarn/visit.varna.bg/index.php(112): DController->displayResults()
#7 {main}