Page navigation not working

Hi, I use the WP PageNavi plugin (https://wordpress.org/plugins/wp-pagenavi/) for almost two years, but suddenly it doesn't show the pages icons at the bottom of my pages anymore. Here an example: http://travelintense.com/travel-blog/ It shows me my 5 latest posts, eventhough I have the setting "show the latest 10 posts", and there is no page navi at the bottom of this page as it used to be (I have written more than 50 posts, and they're all still available online). Could you please let me know if this is a plugin or theme related issue? Thanks a lot, Michaela