Problem:
Gutenberg Editor not Working with Types or how to enable Gutenberg Editor for custom post type
Solution:
Can you navigate to:
=> Toolset => Post Types => Edit Page post type and chose the "Block" or "Per Post" option from "Editor" setting and save your post type.
Problem:
Post Date field doesn't output date format according to Site Language setting.
Solution:
This issue is known to us. The simple workaround to this is, instead of using single field block, you should try to add "Fields and Text" block and then within the fields and text block you should try to add the shortcode to display the post date. For example: