Fatal error: Uncaught Error: Call to undefined method Model::Model() in /var/www/vhosts/vuestroslibros.com/httpdocs/system/application/models/sitemap_model.php:6
Stack trace:
#0 /var/www/vhosts/vuestroslibros.com/httpdocs/system/libraries/Loader.php(185): Sitemap_model->Sitemap_model()
#1 /var/www/vhosts/vuestroslibros.com/httpdocs/system/application/controllers/catalogo.php(549): CI_Loader->model('Sitemap_model', 'sitemap')
#2 /var/www/vhosts/vuestroslibros.com/httpdocs/system/codeigniter/CodeIgniter.php(236): Catalogo->sitemapxml()
#3 /var/www/vhosts/vuestroslibros.com/httpdocs/index.php(121): require_once('/var/www/vhosts...')
#4 {main}
thrown in /var/www/vhosts/vuestroslibros.com/httpdocs/system/application/models/sitemap_model.php on line 6