Hi,
I have done automatic update of wordpress to most recent version. Everything seems work fine. That day when update was done I installed/removed some plugins, edited functions.php and some other edits. But still everyhing worked fine. But today I tried to login to my wordpress site and I got this:
ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.. I tried to delete cookies, another PC, browser, user account, new account, add lines with some PATHS in wp-config, disabled plugins. Now I am really hopeless, don't know what to do next. And sometimes after login I got white blank page, but that is just sometimes. And this problem is also after update. I tried also manual update via FTP. Nothing helped...