I've installed new instance of WP 4.2.2 with Polylang 1.7.5. (It is new instance done for reproducion my problem). My configuration is:
WP settings:
Reading - Front page displays a static page - Front page is set and Posts page is set.
Permalinks: Post name (/%postname%/).
Polylang settings (i've set only one language):
[chcecked] The language is set from the directory name in pretty permalinks;
[checked] Hide URL language information for default language;
[checked] Remove /language/ in pretty permalinks;
[checked] The front page url contains the language code instead of the page name or page id;
[checked] When the front page is visited, set the language according to the browser preference.
When I want to open second page with posts (in my case localhost/blog/page/2) browser displays alert "Site not available ERR_CONNECTION_RESET".
If Polylang is disabled, pagination works well.
If polylang is enabled and permalinks is set to default, it works well too.
Has anybody idea why polylang dosen't work with configuration like mine?