Is C# support broken on the 32-bit versions?

[piratesephiroth]

Godot version:
32-bit versions of Godot 3.0.3 and 3.0.4, running in self-contained mode.

OS/device including version:
Windows 8.1 Pro x64 (6.3.9600), installed less than a week ago so system integrity should be guaranteed

Issue description:
@hpvb
Everything using C# scripts gets compiled without errors but runs for less than a second and crashes. I even tried other examples like the demo projects and bunnymark, always with the same result.

Already tried reinstalling mono v5.12.0 Stable 32-bit and nothing changed. Didn't try older versions because Godot's download page states that only v5.12 will work.
The same projects run absolutely fine on the 64-bit version of Godot.

Steps to reproduce:
Run a 32-bit version of Godot 3.0.4 then open a project that uses C# scripts and try to play it.

Minimal reproduction project:
Literally anything that uses C# scripts, like this demo project

[hpvb]

I'll have a look at this. This worked in my tests on Win 7 pro and Win 10 home. (running 32bit mono binaries on 64bit windows at least) I don't have a Windows 8.1 license. I'll buy one.

[piratesephiroth]

A friend of mine tested on Win 7 Ultimate x64, with Service Pack 1, and got the exact same error.
Again the 64 bit version of mono Godot ran fine on the same system.

[hpvb]

I have a windows 8.1 license now. I'll test for 3.0.7

[neikeq]

Looks like the same as #17299

[piratesephiroth]

Yeah, seems to be the same.
But there's more to this. It seems to be a problem on the system that BUILDS the game. The exported game will fail on any other system.

A while after I posted this issue I began having other problems updating visual studio and even windows itself so I reinstalled it (just the "reset" install, without removing anything) and I began exporting normal 32 bit mono projects again.

[akien-mga]

Duplicate of #17299.