1. The blackout folder should be on the allow list of your antivirus or malwarebytes.
2.Update your video card/gpu driver. Ragnarok run setup set your graphics card ex. Rx 580 3d&hal.
3.Reinstall Blackout use the full client but before you install kindly turn off your antivirus.
PS:if none of this gunna work. Post your specs and the operating you are using. I am running Windows 10 20h2 version without any problem.