Error when loading mission

I am trying to fly the following mission.

https://www.digitalcombatsimulator.com/en/files/3306937/

However, I am having trouble getting it to load. I have followed the installation instructions as I understand them. But I am sure I am missing something, possibly obvious. It may be the mods I installed, or the instructions are incomplete?

I cannot load the mission, even with everything installed. I get the following error:

Need modules for load mission: Pilot Ground

USN-Deckcrew

VPC Object by voc & virpil.com

Alligator by AutoMod

Gun and Patrol_Boats

alligator1171HeliPad

Note, I used the links included in the description and have the following installed in my Mods/Tech folder:

Alligator 1171

Alligator 1171 helipad

Civil_Objects

CombinedArms

DESERT_FARP

Gun and Patrol_Boats

main

Pilot Ground

US Navy Equipment

USNF 95 Mod Pack

WWII Iowa Class 3 Battleships

WWII Units

it appears you have not installed VPC object ;)

It's there, in the folder called "main." I did update it just now, but I still have the issue. :-)

I remember having an issue with that specific mod, that’s the reason I haven’t used it anymore in any of my missions.

It had to be in main/tech or tech/main, can’t remember exactly sorry.

Probably I posted something on one of my old missions threads.

Yeah, I've downloaded and installed everything separately too, and the mission does not work. Every other mission does, so now I suspect the mission is just too complicated and one or more of the mods has been broken by an update.