Hi,
It seems that I have a problem with SharePoint styles. All sites styles are broken after I have installed the Language Pack en-US on my server. The initial inhalation of SharePoint 2013 was the English version so basically I shouldn't have installed English Language pack at all (my mistake). However I don't think I should get this issue because in theory the language pack should contain same styles as the main installation package no?
Also I tried to uninstall the language pack, install a new language pack (en-US) but my problem still persists.
Do you have any idea how I can fix my problem (without re-installing SharePoint..)?
Thanks!