We have guides for getting things setup with PokerStars and ACR here:
PokerStars Configuration GuideWinning Poker Network Configuration Guide (ACR)PokerTracker 4 only supports English so both hand histories and the poker client need to be in English. Once that is setup you can test this on a table by clicking "Play Poker -> Get Hands While Playing" and after taking a seat and playing a hand you should see that get imported and the HUD appear.
If you need further assistance please
enable logging, reproduce this problem and then send your log file to us in a
Support Ticket so we can see what's going on here. You can access the 'Logs' folder with the log file by clicking 'File --> Open User Data Folder' in the main PokerTracker 4 window and the file we need is the text file called 'PokerTracker4' or 'PokerTracker4.log' that is in that folder.