I have a detailed error :
Fatal error: Uncaught Error: Object of class DateTime could not be converted to string in /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/models/CoreModel.php:318 Stack trace: #0 /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/models/CoreModel.php(318): str_replace(Array, Array, Object(DateTime)) #1 [internal function]: MPG_CoreModel::{closure}(Object(DateTime)) #2 /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/models/CoreModel.php(320): array_map(Object(Closure), Array) #3 /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/controllers/CoreController.php(28): MPG_CoreModel::mpg_shortcode_replacer(‘[vc_row][vc_col…’, ‘5’) #4 /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/controllers/CoreController.php(180): MPG_CoreController::core(Array, Object(WP_Post), ‘23113’, ‘/festival/festi…’) #5 /home/teinture/www/wp-includes/class-wp-hook.php(308): MPG_CoreController::mpg_view_multipages_standard(”) in /home/teinture/www/wp-content/plugins/multiple-pages-generator-by-porthas/models/CoreModel.php on line 318