This error, Failed to load System data, may appear when trying to start Scarlet Nexus on Windows 10. This is due to the Cyrillic alphabet, so you must make sure that you fulfill all the requirements.

How to fix "Unable to load system data" error on Scarlet Nexus

To do this, make sure that there is no Cyrillic on the path to the folder with the installed game. It's possible that the Steam folder on your computer is nested inside another folder called "Games". In this case, rename it to Games or something like that.

The second point is to make sure that the Windows 10 username does not contain Cyrillic. To change the Windows user (account) name, follow the instructions from this article .

If something does not work out, you will have to create a separate account. To do this, open the same "search" and enter "Command Prompt". Right-click on the inscription and select "Run as administrator". Enter the net user NAME /add command. Instead of NAME, enter the username in LATIN!!!

Next, type control userpasswords2 in the search to open the user management program. Select a new user and click on "Properties". Check the box for the group??e "Administrators" and confirm the changes. This action is optional, but will allow you to install new programs for this user (because the desktops will be different).