When you use the TOR browser or even any VPN then usually you will have this difficulties. Use another browser and make sure to check remember login (Always stay logged in). You will not need to login again. Of-course you want to make sure that your PC is protected and no one else (untrustworthy) is using the PC.

Let me know if you already know to use another browser (chrome or firefox etc) using the port your TOR browser have to keep you anonymous.