If you can't sign in to your PlayStation App, try resetting your PSN password in a web browser or on your PS4.
1. Incorrect login information: Make sure you are entering your email address and password correctly.
2. Multiple failed attempts: If you enter the wrong password multiple times, you may be locked out of your account for a period of time.
3. Network issues: Your internet connection may be unstable or down, preventing you from accessing your account.
4. Account restrictions: Some users may have restrictions on their account that prevent them from changing their password.