Can't write config file when path has a written Asccent

[ItsIgnacioPortal]

So, as of version v0.8.2+ea9a457, when I run the game, it runs normally, but a console with the following output shows up as well:

[i][main] OpenBlok, created by Mátyás Mustoha, v0.8.2+ea9a457
[i][init] Initializing video...
[i][video] Selected 'direct3d' renderer
[w][config] Could not write config file 'C:\Users\CoolUsèr\AppData\Roaming\.\openblok\input.cfg'
[i][init] Loading resources from 'C:\Users\CoolUsèr\Documents\openblok_v082_windows\openblok\./data/'
[i][init] Theme: 'default'

Where CoolUs├¿r should instead be CoolUsér (Notice the written accent on the é )
(This is not my actual username, but it has been replaced with one that's close enough for privacy reasons).
As you would expect from this error, after I change my configuration, close the game, and reopen it all of my configuration is reset :/