I get a message "Account configuration not supported" when logging in.

Use IBKR Mobile Authentication (IB Key) for secure two-factor authentication when logging in. If you are an existing IBKR client and have already activated IBKR Mobile Authentication (IB Key) via IBKR Mobile, you do not have to take any action. Once IBKR Mobile Authentication (IB Key) has been activated on your mobile device, it will authenticate your login from both IBKR apps…

According to the Interactive Brokers security policies, only one IBKR Mobile Authentication (IB Key) application can be active for a given user. It is not possible to have two IBKR Mobile Authentication (IB Key) applications active at the same time on different devices. Also, the IBKR Mobile Authentication (IB Key) application cannot be installed on an iPad…

The IBKR API is not available to IBKR Lite accounts. If you are logged into an IBKR Lite account through an API, when you submit an order you will be given an error message "You are not allowed to trade on IBKR-LITE account."

More information on IBKR Pro and IBKR Lite…

The IBKR API is not available to IBKR Lite accounts. If you are logged into an IBKR Lite account through an API, when you submit an order you will be given an error message "You are not allowed to trade on IBKR-LITE account."

Additional Information…