Server error on custom fields

Hi,
When i try to edit or create new custom fields i get this error:

The website encountered an error while retrieving http://www.website.com/templates/wp-admin/admin.php?page=wpcf-edit-type. It may be down for maintenance or configured incorrectly.

I’ve tried some reinstall but nothing works, can you help me?

https://wordpress.org/plugins/types/