Fatal error: Uncaught Error: Call to undefined function add_action() in /home/user2040093/www/belaquilon.by/wp-content/plugins/3d-viewer/3d-viewer-block/inc/block.php:6 Stack trace: #0 /home/user2040093/www/belaquilon.by/wp-content/plugins/3d-viewer/3d-viewer-block/inc/block.php(45): TDViewerBlock->__construct() #1 {main} thrown in /home/user2040093/www/belaquilon.by/wp-content/plugins/3d-viewer/3d-viewer-block/inc/block.php on line 6