Unreal Engine games use ` caron, not ~ Tilde to open the console.

[IchigoM8]

I fixed my issue where I had to use a specific keyboard layout for the Caron ` to work, with [Microsoft Keyboard Layout Creator (MSKLC) Version 1.4].
It was basically set as a dead key, and on some keyboard layouts it's on some other button.
Now I can just use 1 push of a button also don't get the problem of creating an empty space with a hidden symbol.
I set my tilde as shift+caron, and tilde never works to open the console, as it never was used by unreal engine, people just assumed it was used.

So a more accurate button to say is, make sure sub key ~ tilde uses ` caron as the main key, or find what button does caron to open the console, or switch/modify keyboard layout.

[Lyall]

Tilde is just the default keybind the game ships with, you can edit it by modifying %LOCALAPPDATA%\DragonQuestTreasures\Saved\Config\WindowsNoEditor\Input.ini and adding

[/Script/Engine.InputSettings]
ConsoleKeys = NameOfKey

Just change NameOfKey to whatever is valid for your key layout.

[IchigoM8]

I don't have to do it, it's like you just copy pasted a response, instead of reading what I said.
I know about it, I'm saying Tilde is not the default key, Caron is. Tilde is just a common sub key that seems to be in the same location always, while the main key can differ from layout to layout and is always set as dead key, and as dead key messes up the commands, every time when using it, as it puts an empty space and hides they main key visually. Who ever designed the keyboard layouts at microsoft didn't know what they were doing.

Not what you have to do, but what everyone else would have to do.
A proper fix is making a custom keyboard layout, or change the key to something else than a key that has a deadkey, so you don't get invalid commands.
The custom keyboard layout appears in the same place where you switch keyboard layouts, you're just making another profile that windows itself can recognize without having a third party app open.