Php errors and logo not change

Dear.
1,3. Change default heading background image: If you want change it, Please update Jobmonster theme on your site to latest version 4.6.6.2 then install and switch your site to use Jobmonster Child Theme, then add custom code in file functions.php of Jobmonster Child theme:

add_filter('noo_default_page_heading_image', function(){
	
	$term = get_queried_object();
	
	//Check is job category by slug
	if(!empty($term->slug)){
		
		$slug = $term->slug;
		
		if($slug == 'JOB_CATEGORY_1'){
			return 'IMAGE_FOR_JOB_CATEGORY_1';
		}elseif ($slug == 'JOB_CATEGORY_2'){
			return 'IMAGE_FOR_JOB_CATEGORY_2';
		}
	}
	
	return 'YOUR_DEFAULT_IMAGE_URL';
});

In custom code you can change image for each Job Category via check by slug, please change 'IMAGE_FOR_JOB_CATEGORY_1' and 'IMAGE_FOR_JOB_CATEGORY_2' to job category Slug you want change image and change 'IMAGE_FOR_JOB_CATEGORY_1' and 'IMAGE_FOR_JOB_CATEGORY_2' to image you want use.

'YOUR_DEFAULT_IMAGE_URL' is default image you want use.

2.Change text: You can change it via use Loco plugin to translate theme.

4. Add to cart redirect to checkout: Please go to admin menu 'WooCommerce -> Settings -> Products' and check setting 'Add to cart behaviour', i see you use 'Redirect to the cart page after successful addition '

5. Not Add to cart button: Because this product Not have PRICE

Best regards.

Dear, Because in Jobmonster, each Customer only have one package, so, when customer select package, the theme will redirect to checkout page.

Best regards.