Hi there! I see you're having trouble signing in to the BJ's Wholesale Club app. Let's get this sorted out together.

First, can I ask if you are seeing any specific error messages when you try to sign in? Also, have you tried resetting your password already or checking that your membership is active?

In the meantime, here's a simple step-by-step you can try:

1. Verify Membership Status: Make sure your BJ’s membership is current and that you are not experiencing any account Holds or issues. Sometimes membership status can prevent login.

2. Reset Password: If you think your credentials might be incorrect, use the app’s “Forgot Password” or password recovery option to reset your password securely.

3. Update the App: Check your Windows device’s Microsoft Store for any updates to the BJ’s app. An outdated app can sometimes cause login issues.

4. Check Network Connection: Ensure your device has a stable internet connection. Also, if you are using a VPN, try disconnecting it and then attempt to log in again, as VPNs can interfere with app authentication.

5. Clear App Cache and Data: On Windows, if possible, try clearing the app's temporary files or reinstalling the app to remove any corrupted data.

If after these steps you still can't sign in, please let me know what exact step gave a problem or what error message shows up, so I can assist further or look into any account-specific issues.

Are you comfortable trying these steps now?