originally posted by Gunsumoa
Some Upgrades are part of the story and if you use the trainer it can stop that mission from completing.
It seems a bad idea to upgrade the ground vehicle with the trainer as it seems to have broken a mission to upgrade the shields on it.
I have been given a mission to upgrade the shields on the ground vehicle but with the trainer I already got it upgraded now when it asked me to craft it I was able to craft it BUT I am unable to use it as it is already done so the mission can not go forward.
Not saying there is a problem with the trainer just a problem that it can cause later in the story so be careful.
Maybe its a bug in the game and has nothing to do with the trainer, I googled it and I am not the only one to have this happen the only problem is that nobody ever admits they cheated in these posts so they leave an explanation that just says what they went through and they cant complete the mission.
I am pretty sure the shield for the Nomad is a bug in the game. I ran into as well and like you said if you Google it there are a ton of people with that problem. Not sure if it is because you are able to get it through leveling (Nomad blueprints seem to unlock at different levels) or what but I am pretty sure it has nothing to do with the trainer.