Make sure you are using the latest version of PokerTracker 4 and that things are still setup correctly with your poker site(s):
Site Configuration GuideIf that doesn't help then 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.