If you went to create a single tournament of any sort, enter this
9 rounds
4 people per team
16 teams
Due to how the overflow thingy works, the number of participants goes from positive to negative several times over, and when the numbers are of above, it results in 0.
When you click continue, it works. I don't want to risk failing the entire WZ server by creating such tournament, but I will try it later if this bug is found out again.
This is in the programming section because this is an overflow problem.

I don't want to risk failing the entire WZ server by creating such tournament, but I will make other people do it.

So that game had more than 40 players per game, and testing definitely didn't work. I found out that a 10 round single tournament with 8 teams of 4 also worked, which resulted in a nice 32 players per game. I still didn't test it yet, and I am thinking of a better day and a better way to do so.

From which platform are you playing?
Almost sure it isn't UJC.

Android app.

Looks like the app is missing an if statement somewhere. Browser doesnt allow you to create excessively big tourneys

On the standalone client, it does indeed overflow to 0, but still not allowed to make it. (And if you set it to 4x5 players per game, it then hits you with the 1k/tourney limit)

Tournament size cannot be greater than 512 players

You can make with 999 players?!

1. For other clients, it's probably the overflow borderline. You can simply test for other zero-points.
2. Use 10-4-8 provided in post no. 3.

The reason why the zero-bug works is because the player number overflows so much it flows to negative and then all the way back to zero.

May be unsigned int.

Good find, I'll get this fixed in the next update

Thank you.
(quick, do it asap, crash the server before he patches it)

[FINALE 1]
I tested it out with a 32-P 10-round private one, and it did hitme with "Too many players invited to tournament". I think the main reason is that Unity doesn't think it has overflowed deep inside its code, but somehow passed the separate overflow thing in the UI. Which means that in the code the tournament did not overflow and is still identified as more than 512. This can be seen as a UI-Code communication flaw.

Well, it isn't fixed, soooooooooooooo