RDR 2 does not discount (Red Dead Redemption 2)

Hello, downloaded rdr 2 on PC, nothing foreshadowed trouble. Launched. The menu seems to be fine, but it was only necessary to start the plot of the game as immediately popped this notification (photo attached). Please tell me what it could be?

P. S. My iron:

Video card - Radeon rx 570

Processor - AMD Athlon x4 620

RAM - 8gb (physical) 16gb (virtual)

Windows 8.1

I hope someone tells me.