There are a few things you could try:
- Clear your cache and cookies.
- Try a different Browser (Chrome and Firefox are recommended)
- Try Ctrl + F5 on the Setting spage (Though I doubt this will work)
- If you have an account on Lady Popular Classic, try changing your password there, it should be changed for both games.
If none of those things work, you will need to send a feedback in game so that it can be forwarded to the appropriate people to work on fixing it
If you're having trouble with any of these suggestions let me know - please tell me what browser you are on, as well