Fatal error: Uncaught Error: Class "EssentialBlocks\Core\Block" not found in C:\inetpub\wwwroot\subredsurpage\wp-content\plugins\essential-blocks\includes\Blocks\FlipBox.php:6 Stack trace: #0 {main} thrown in C:\inetpub\wwwroot\subredsurpage\wp-content\plugins\essential-blocks\includes\Blocks\FlipBox.php on line 6