On what poker site? What gametype? Without further information on where/what you play I cannot be more specific so please check your Poker Site(s) are configured correctly with PokerTracker 4
Site Configuration GuidePokerTracker 4 only supports English so both hand histories and the poker client software (where applicable) need to be in English.
Once that is setup you can click 'Play Poker -> Get Hands While Playing' in PokerTracker 4 and after playing a hand you should see that get imported into PokerTracker 4.