tboes

I had the same problem. There  should be a folder in your directory called update. Try to install them through the there. It worked for me. Hope I could help

When you press control  alt end you will get something that says which agency you are in depending  if you are loading an agency call out or not. Now for that you will need to switch your agency and if not than it may be the same case for whatever you are using. Hope I could help

The way that the core LSPDFR callout system works is that there are a handful of set callout priorities from "low" to "always" if I recall correctly.
 
Based on those priorities, LSPDFR picks a weighted random callout from the available callouts and starts it. However, there are plenty of reasons that the callout might "refuse" to run after being chosen. My callouts, for example, will decline to run if you are too far away from a spawn point for that callout, among other reasons.
 
When you use Callout Manager, it force triggers the callout you choose rather than LSPDFR's random system. If LSPDFR picks a callout randomly, and that callout declines to run, typically you'll never even realize, as no message is displayed!
 
So usually, this will be why Callout Manager says it "fails" to start the callout — the callout has declined to continue for some good reason. If you're curious, press F4 to bring up the RPH console. I always try to leave a message in the log explaining why the callout will not start on that occasion. Hopefully other developers do too!

In OpenIV, go to ASI Manager and uninstall ASI Loader and OpenIV.ASI and then click install again to reinstall them. Next, restart your PC, and try loading into the game again and see if that works.

When replacing, you generally don't need all four files that some cars have.  The +hi.ytd I believe is more for higher quality.  As long as you just place the two replacement files in the correct patchday, they should override the current slot.  Use your very latest patchday, even if it doesn't have the same vehicle files.