You would be better off asking this over in the Tech Support forum. There are a couple recent threads over there from other players having the same issue. One possible cause mentioned is that your video card is below the minimum requirements for WOW; another is that the GPU is so old that driver updates are no longer being issued for it and the game is picking up on that.
https://us.forums.blizzard.com/en/wow/t/your-graphics-card-driver-is-out-of-date-when-it-isnt/707862
https://us.forums.blizzard.com/en/wow/t/gtx-765m-drivers-up-to-date-but-it-says-its-not/679373