Show Block when Listing one Content type
Please follow these instructions carefully:

1) Go to /admin/structure/block and click on "Pleace block" button in the region you want to add your view block, for example "Content" region.

2) Now you will see at least three tabs:"Content types", "Pages", "Roles"

3) In tab "Content types" select "DEF" type content

4) Be sure on tab "Pages" is selected the radio button option "Show for the listed pages", leave empty the text area on this tab.

5) Save block.

Hope this help.