BitDefender's Safe Files option will prevent the Launcher from accessing your Documents folder, where a lot of game setting files are stored at. Disabling this option will subsequently allow the Launcher to read and write on those files, stopping the error from occurring.
Launcher crashes can also sometimes be caused by misconfigured Proxy Settings. Before sending a ticket to the Customer Support service, first try the procedure below.
- From Start, search for Internet Options. If you are using Windows 10, simply type in Internet Options after opening the menu.
- Click the Connections tab.
- Click LAN Settings and make sure that all options are turned off.