"Invalid account" indicates that your MetaTrader 4 (MT4) cannot confirm your account information. Possible reasons include:
1. Incorrect account number or password.
2. Account expiration.
3. Selecting the wrong trading server.
You can try the following solutions:
1. Confirm that the account number and password are correct.
2. Check whether the account has expired.
3. Ensure your server is correct.

