I still couldn’t solve the error, I reinstalled the plugin, but the error persists. Occurred after the last update:
PHP Fatal error: Uncaught Error: Undefined constant “UltimatePostKit\Modules\FanelList\Widgets\BDTEP_NC” in /var/www/html/wp-content/plugins/ultimate-post-kit/modules/fanel-list/widgets/fanel- list.php:751
