To resolve the issue with signing in to the CSC GO app, follow these detailed steps:

1. Check Internet Connection: Ensure your device is connected to a stable internet connection. If you're on Wi-Fi, try switching to mobile data, or vice versa.

2. Restart the App: Close the CSC GO app completely and then reopen it. Sometimes a simple restart can resolve temporary issues.

3. Update the App: Ensure you are using the latest version of the CSC GO app. Check your device's app store for any available updates and install them.

4. Clear App Cache (if applicable):
- For Android: Go to Settings > Apps > CSC GO > Storage > Clear Cache.
- For iOS, uninstalling and reinstalling the app will clear the cache.

5. Reset Password: If you are receiving a message about incorrect credentials, it might be time to reset your password.
- Open the app, tap on "Forgot Password?" and follow the prompts to receive a password reset link via email - learn more.

6. Check Email Address: If you think you might be using the wrong email address, take note of the one you are trying to use. If you’ve forgotten it, contacting Customer Care at 855-662-4685 could help you retrieve your account - learn more.

7. Unlock Your Account: If you suspect your account is locked, you may need to contact customer support to unlock it. This is a common issue with accounts that have multiple failed login attempts - learn more.

8. Contact Support: If none of the above steps work, consider reaching out to CSC support directly. They can provide personalized assistance. You can find customer support contact information on their help section - learn more.

Following these steps should help you successfully log into the CSC GO app. If the issue persists, detailed guidance from customer support will be your best option.