I'm using elementary OS for months with no problem (don't installed nothing and uninstall anything, same apps for months). But yesterday I rebooted my computer, typed my password to login and pressed enter, and then got into infinite login loop. I tried with terminal (Ctrl+Alt+F1) and when I login I saw this:
manpath: can't set the locale; make sure $LC_* and $LANG are correct
Tried with sudo apt-get update, and sudo apt-get upgrade but nothing happened.