Currently having the same problem. I was using the Boywond, Annis ZR-380 and the modification was working for awhile, but after installing another add-on vehicle it stopped working and I've been changing the modkit IDs using the numbers provided and none of them seem to get the modifications and tuning to work. I don't know if I'm missing something or doing something wrong.
The original Modkit ID was 888 and the addon car I had installed was also from Boywond.

Hello, I've been modding a lot of games over the years but Grand Theft Auto V and IV have got to be the most annoying games.
My only error that I have come across that I cannot, for the love of me, remove or even fix. Its getting really bad.

A new guard page for the stack cannot be created

This is got to be the stupidest error I've seen.
I've removed mods and edited files and XMLs to try and fix this problem. Nothing.
I have installed.

Vanillaworks Extended
Dispatch Extended (San Andres Version) and Dispatch of Variety
World of Variety
Gangs of Los Santos
IVPack

(Not in that Order but you know what I mean, good order install)
And a couple simple scripting mods, nothing complex.

And NO I cannot repair or reinstall Netframework, it doesn't work like that for Windows 10 Users

This error only occurs when I begin the first items for the Heist mission of retrieving the BZ Gas trucks or the Bugstars trucks, I crash a few seconds after entering the locations or starting the mission.

https://imgur.com/YteQ37Q