Recently I updated the Toolset Types to the latest version 3.3.11. But I think it has a bug. It's restricting one of the custom posts from saving. Hence I have to roll back to the previous version and things are working fine.
While saving the post type the WP is showing "There has been a critical error on your website. Please check your site admin email inbox for instructions."
Please check the issue at the earliest.
The WP debugging is also enabled.