Not a Valid Json Element

Hello!
Most probably it is a caching issue.
Delete all your caches and then try again

Hi dudo,
Thank you for your quick response.

I am getting this issue even while running site locally. There is no cache plugin installed on the site.

Thank you

Hi I found this.
Do you know why there is 302 status code for this ajax?

1. Request URL: /wp-admin/admin-ajax.php?action=yasr_load_vv&post_id=7400
2. Request Method: GET
3. Status Code: 302 Found

Seems like you’ve a 302 code when admin-ajax.php is used.

Most probably it is the theme, or a plugin.
You can try the solution posted here https://stackoverflow.com/questions/9408334/wordpress-admin-ajax-results-in-error-302-redirect

Let me know!

Thank you. I think I am very close to solution now.
I found the code in the functions.php which is causing issue.

if (is_user_logged_in() && is_admin() && !current_user_can('administrator')) {
	global $current_user;
	wp_get_current_user();
	$user_info = get_userdata($current_user->ID);
	if ($user_info->wp_user_level == 0) {
		wp_redirect(home_url());
		exit;
	}
}

I need to redirect subscriber to the homepage when they try to access /wp-admin. When we use this code it is causes with the rating. Could you please suggest how can I redirect without conflicting with the plugin?

Hi,
I found the solution. Here is the final code which fix this issue.

if (is_admin() && !current_user_can('administrator') && !(defined('DOING_AJAX') && DOING_AJAX)) {
		global $current_user;
		wp_get_current_user();
		$user_info = get_userdata($current_user->ID);
		if ($user_info->wp_user_level == 0) {
			wp_redirect(home_url());
			exit;
		}
	}

Thank you so much for your help!

Great, thanks for let me know!
Which theme are you using?