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)
Plugin conflicts cause most of these problems.

If you are able to log into using wp-login.php kindly log inside and check after disabling one by one each plugin and check your site wp-admin in different browser if disabling a particular plugin gives you access to wp-admin then that plugin is the cause of this.

It also happens in plesk cpanel sometimes due to permission problems.

Kindly check if you are able to add more media and or try adding one more plugin. If it gives error while uploading media that cannot add or permission problem then try to change folder permissions to 755 for wp-admin and you should be good.