Okay! Sooo – I updated my GPU driver through Nvidia to the newest one, and I switched the API in the RDR2 Graphics settings from Vulkan, to Direct X 12. I also messed with the permissions with the Vulkan file within systems 32, but couldn’t really change much, so I don’t think that had any affect.
Buuuut – RedM actually loaded up, and I didn’t get the same error!! So, this is progress! Only thing now, is that it seems to be frozen on this screen. But honestly, I’m just thrilled I’m no longer getting that damn Vulkan memory error. 
Oh! I also gave RedM High Performance in the graphics settings under “system”.
