Erro

RuntimeException: Error decoding JSON data: Syntax error in /home/oabitabuna/www/libraries/vendor/joomla/registry/src/Format/Json.php:72 Stack trace: #0 /home/oabitabuna/www/libraries/vendor/joomla/registry/src/Registry.php(366): Joomla\Registry\Format\Json->stringToObject('{show_title:,li...', Array) #1 /home/oabitabuna/www/libraries/vendor/joomla/registry/src/Registry.php(72): Joomla\Registry\Registry->loadString('{show_title:,li...') #2 /home/oabitabuna/www/components/com_content/models/article.php(162): Joomla\Registry\Registry->__construct('{show_title:,li...') #3 /home/oabitabuna/www/libraries/legacy/view/legacy.php(422): ContentModelArticle->getItem() #4 /home/oabitabuna/www/components/com_content/views/article/view.html.php(42): JViewLegacy->get('Item') #5 /home/oabitabuna/www/libraries/joomla/cache/controller/view.php(98): ContentViewArticle->display() #6 /home/oabitabuna/www/libraries/legacy/controller/legacy.php(662): JCacheControllerView->get(Object(ContentViewArticle), 'display') #7 /home/oabitabuna/www/components/com_content/controller.php(113): JControllerLegacy->display(true, Array) #8 /home/oabitabuna/www/libraries/legacy/controller/legacy.php(709): ContentController->display() #9 /home/oabitabuna/www/components/com_content/content.php(39): JControllerLegacy->execute('') #10 /home/oabitabuna/www/libraries/cms/component/helper.php(394): require_once('/home/oabitabun...') #11 /home/oabitabuna/www/libraries/cms/component/helper.php(369): JComponentHelper::executeComponent('/home/oabitabun...') #12 /home/oabitabuna/www/libraries/cms/application/site.php(191): JComponentHelper::renderComponent('com_content') #13 /home/oabitabuna/www/libraries/cms/application/site.php(230): JApplicationSite->dispatch() #14 /home/oabitabuna/www/libraries/cms/application/cms.php(265): JApplicationSite->doExecute() #15 /home/oabitabuna/www/index.php(49): JApplicationCms->execute() #16 {main}