So, for whatever reason, the Doomsday Heist DLC is not on my copy of GTA V. I did a fresh install two days ago and allowed the launcher to download all the DLCs up to that point, or so I thought. This is a store-bought physical version of V (can supply photos for those doubting), and I have not made any major changes to the game as of yet, other than those highlighted below.
The version of V I'm running is 1.0.1737.0 according to the .exe properties, and the mod which alerted me to this problem was ikt's Add-On Vehicle Spawner. The only other mods I have installed at this point in time is Scripthook, NaturalVision Remastered and a modified popgroups.ymt to spawn DLC vehicles in traffic. I do not see how any of these mods could disable an entire DLC, especially one that came out quite a while ago.
Whenever I try to spawn a vehicle from the Doomsday Heist DLC, I'm greeted with the following message:
"This version of the game does not have the Doomsday Heist DLC content. Game version: VER_1_0_1737_0_NOSTEAM"
I have looked this message up but found only 10 results on google, none of which pertained to my problem. Here is an Imgur album showing how my game looks like, DLC cars spawning in traffic, and the odd absence of the Doomsday Heist. Is there any way to get the launcher to manually download a DLC? This is such a strange problem.
Thanks in advance for those who find a solution.