Hello! Thanks for reaching out. I've got some suggestions for you. Let's see if any of these help.
Fully close the EA app. Open Task Manager and make sure the EA app/game processes are gone. Once that is confirmed, right click on the EA App and choose "Run as administrator". Then, launch FC 26 from the EA App.
If that doesn't help, reinstall EA Anticheat from C:\Program Files\EA\AC\. Right click on EAAntiCheat.Installer.exe and run as an administrator. Choose FC 26 and hit Uninstall All and then reinstall it. Restart Windows and try launching FC 26 again.
Let me know if this helps or not. Thanks!