Fixed Contact Form

Fatal error: Uncaught TypeError: strtoupper() expects parameter 1 to be string, null given in /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/Dom.php:101 Stack trace: #0 /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/Dom.php(101): strtoupper(NULL) #1 /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/Dom.php(68): WP_Rocket\Engine\Optimization\LazyRenderContent\Frontend\Processor\Dom->add_hash_to_element(Object(DOMElement), 2, '<!DOCTYPE html>...') #2 /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/inc/Engine/Optimization/LazyRenderContent/Frontend/Controller.php(149): WP_Rocket\Engine\Optimization\LazyRenderContent\Frontend\Processor\Dom->add_hashes('<!DOCTYPE html>...') #3 /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/ in /home/h238977/public_html/zero-one-media.ir/wp-content/plugins/wp-rocket/inc/Engine/Optimization/LazyRenderContent/Frontend/Processor/Dom.php on line 101