I have and I got that error that I posted.
Has anyone tested the horizon secrets/unicorns, yet?
You get the tampered with error when the profile ID is wrong, Forza uses this to encrypt the data.
So horizon can’t decrypt the data, hence why it doesn’t load properly.
So it will be fine first time when the game is released, there wont be problems?
Sent you a PM, Could you report back if you get the same greyed out box.
On release day, will it be fine to edit, has that been tested?
Yes it will be fine. If it isn’t, the Developers can always make a quick adjustment.
I’ve already told you sir the editor works perfectly, This error is for a completed game only, And that’s if it is a editor error or if it something to do with the game save in question.
The save is all greyed for me as well.
I think it may do that because you’ve completed the whole career.
I could be wrong though, but it’s all greyed out for me.
Hopefully it’s just because the career has ended but hopefully the Dev’s can fix this.

Thanks Keyring, So Helpful, Will it be alright on release day to mod all cars and 250-999 million?
Yeah thought it wasn’t on my end as your getting the same error. Yeah could be the main career is done. There are many side races i haven’t done so its not 100% completed but the story is.
Will it be safe to mod all cars and about 800 million straight away? what your suggestion?
I get that same problem error forza: livery data has been tampered with. Does anyone know how to fix it ?
Just hit ok, and you should be able to use the editor.
Can you also upload the save you used to media fire and sending me the Downlosd link.
will you be able to do it, yeah… is it safe to mod that much right away the day it comes out? probably not… watch out for the ban hammer with that much credits.
It comes out 3 days earlier in US than UK, as i said in another post, will someone be able to test how many credits and will modding all cars at start be okay?
I will try and edit it again, and if it doesnt work then i will send the link to media fire and then to you.
Comes out in US tomorrow, can someone test it and see how many credits to mod and if all cars is okay.
hey how do i download the save editor??
It is in Horizon and is under the ‘Game Modders’ tab.
If you’re referring to Horizon, download it here.