AutoInvest disconnection during weekends and non-trading hour is normal, typically lasts for short duration and it is expected to reconnect automatically. However, if you have turned on your 2FA, you will need to reconnect it manually by resolving the authentication challenge.
1. If you are using PC / laptop:
Click on "Dashboard" on the left hand side of the home page.
Click "Access your VM" button on the top right of the page
Close any of the IB DRIVER / IB Gateway application and wait until both closes automatically.
Open the IB Driver App
Open the IB Driver App and login with your IB details
A 2 FA challenge will appear, resolve it and wait for it to automatically reconnect.