Fatal error: Uncaught Error: Call to undefined function BP3D\Base\add_action() in C:\xampp\htdocs\wp-content\plugins\3d-viewer\inc\Base\ExtendMimeType.php:80 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\3d-viewer\inc\Base\ExtendMimeType.php on line 80