Http AJAX error 200

I have a quite clean fresh D8 site on lightspeed virtual server and a problem while trying to update modules. Each time I try to use automatic update I get:

AJAX HTTP error.
HTTP error: 200
Diagnostic data.
Path: /batch?id=21&op=do_nojs&op=do
StatusText: OK

Have anyone seen such issue on D8? I have seen some issues about it related to drupal for firebug module but I do not have such installed. Please help…

Drupal version: