Drupal - Views Page not showing pager

This can have a whole bunch of reasons. I'm just providing the imho most probable non-obvious one:

Go to "pager settings" (on your screenshot click "Paged, 5 items") and change the "pager id". Docs say this is only needed when there is more than one view on a page, but i saw live examples where this fixed a non-showing pager on a single-view page.

I came across this issue recently since upgrading to views 3.8. for me the issue was caused by views_php module as discussed here: https://www.drupal.org/node/2276165 there is also a patch available to fix it.