If you are a Windows 7 user, you may observe the error below:
Please run Windows updates, your system is lacking critical SHA-2 code signing support required by October 2020
From October the 6th, you will need to ensure that last year's critical Windows 7 update for SHA-2 support is installed to continue playing.
You can install the latest Windows updates via the Windows 7 Control Panel.
For more information on the SHA-2 update, please see: https://support.microsoft.com/en-us/help/4472027/2019-sha-2-code-signing-support-requirement-for-windows-and-wsus