I'm not having problems with vanilla missions actually. The last time that happened to me with a vanilla mission was just in this post a year ago to see what the problem was, since then I did not edit with alive because I ended up very frustrated. Just as I am feeling now, it is clear that I am not able to edit anything with alive and others mods.
Just now I tried tanoa showcase with cloud save and get in ace modules to test, and mission is working.

My problem is that when I create a mission with some mods and I put the data module in the cloud. If I create the mission and I put the data in local it seems that I don't have problems, it even appears in recent operations in warroom.
http://alivemod.com/forum/conversation/post/22299

Regarding the mission that you say, do you mean the one that I edited from tanoa showcase or battle of lythium? In tanoa showcase I only changed the option of the data module from the local to cloud, and work, same to your "vanilla" battle of lythium setting data to cloud.

So I do not think this has a solution, it seems a failure in my missions itself.

No, in first try only, and I think that was a client issue because start and close mission coninously during 12h...,

@Spark As I said yesterday I tested your tanoa showcase mission and worked, after I edited pbo to set data to cloud and work too.
...
Second try (working):
rpt https://pastebin.com/1pASXmrL
aliveserver log https://pastebin.com/JevkJqPW
Third test working.

I re-edited your mission, set cloud and add some blue playable groups, IS WORKING, REPEAT IS WORKING.
rpt https://pastebin.com/NFMQPnzK
aliveserver log https://pastebin.com/JevkJqPW

@HeroesandvillainsOS Ok we are on to something. A dev has looked at your rpts and can now see exactly what is failing but they still aren’t sure why. Can you send over a vanilla mission that this happens to you with please.

And what do he think is the error? because I have spent several days 12 hours in a row with this, and I am already crazy and tired.

So in the end they tell me it's a mod, but the mods work well in local save, that's when I put it in the cloud when it fails. A year ago I did not have the possibility to put a local option because it did not exist, and I used other mods (RHS), as I said some times re-editing my mission a year ago that work with same fucking mods:
http://alivemod.com/forum/conversation/post/16153

I already tried ACE with alive tanoa showcase cloud to discard ACE incompatibility and it worked.
I will not recommend to the Spanish community Alive war-room, it gives a lot of problems, to me in particular the same one since a year ago. And I'm very tired, devs have not even tried my mission once, they can do a better debug to see the failure than me.

I do not intend to do more tests with vanilla, I've been with this for 5 days, and not a couple of hours a day, no, up to 12 hours in a row. There they have the files of my mission and the logs. I am tired.
http://alivemod.com/forum/conversation/post/22319

Yes,

Regarding the mission that you say, do you mean the one that I edited from tanoa showcase or battle of lythium? In tanoa showcase I only changed the option of the data module from the local to cloud, and work, same to your "vanilla" battle of lythium setting data to cloud.

I test just now again and its working, so I don't understand what is happening with mine.

P.S: But don't show nothing when you do click in war-room http://alivemod.com/war-room/showoperation?name=Battle%20of%20Lythium&map=lythium&clan=111sq%20GCV