Question: i have create a Custom Post Type calle "Places".
I have created a Custom Field with 

Field Type "Multi CheckBox"
Option Title "Type of Pub"
Option values "Sports, Rock, Biker, Beer, Live Band, Restro, Gastro, Irish, Karaoke Bar"
Field Title "Type of Pub"
Field name "typeofpub"

When i Add New Places, Type of Pub with Values with checkbox shows up on edit page.
I selected all the values (Sports, Rock......)

How do i call the metadata to display is custom field on a post.

Answer: 
In such cases, problem is probably with `.htaccess` file. Check if you use Multisite or which type (subdir vs subdomain)
Changing Wordpress Salts solved this same problem, for me.