PC Terraria silently crashes on start-up

Pixelnando

Skeletron Prime
Hello! My friend has not been able to play Terraria since version 1.4 released. tModLoader works just fine, and it's in 1.3.5.3.
Upon opening Terraria, Steam will detect the game as "Running", but after about 4 seconds, it returns to normal, with nothing happening at all.
After opening TerrariaServer.exe for any potential error messages, we got greeted by this:

1623597598430.png


The error message is in Portuguese, but it roughly says:

Unhandled Exception: System.BadImageFormatException: Could not load file or assembly: 'Microsoft.Xna.Framework.dll' or one of its dependencies. is not a valid Win32 application. (HRESULT exception: 0x800700C1)
in Terraria.Program.LaunchGame(String[] args, Boolean monoArgs)
in Terraria.WindowsLaunch.Main(String[] args)


We have tried multiple things, such as repairing and reinstalling .Xna Framework, replacing Microsoft.Xna.Framework.dll with a different .dll, changing the compatibility settings in the Terraria executable, validating game integrity on Steam, but nothing has worked so far. Help would be much appreciated. Thank you!
 
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