I managed to fix it. Both why em's and red dead offline is working. @WesternGamer Sorry to waste your time bro but thanks for helping.
@Stupter1 I fixed it by giving the whole rdr2 folder read/write perimission and turning off my anti virus for that folder. Might be the same problem with yours. I had one ctd so far, i am just gonna run around for a bit to see if the crash was a one off or conflicts with why em's and red dead offline.