it happened to me too :/

Hey, this problem happened to me too and I just solved it. I'm using Windows so idk if this works on MacOs. But here's what I did (not an expert on these things, this is just what worked with me):

First of all, the problem is (probably) with the Brazilian Portuguese language (don't know why). So, you just have to find the location where the configurations of itch.io app is and change the locale from 'pt-BR' back to 'en-US'.

To do this in Windows:
1.  Go to C:\Users\username\AppData\Roaming\itch
2. Open the "preferences.json" file with the NotePad, go to the end of the line and you'll see the part where it says the language you chose. Change to this: "lang":"en-US".
3.  Open the "Preferences" file with the NotePad and change the dictionaries part to 'en-US' (that's what you'll do with basically everything). I don't know if changing the dictionaries is essential to solving this, but I changed just in case.
4.  Now go to Partitions\itch-app and do the same thing of Step 3.
5. Go to Partitions\itchio-3424454 and do the same thing of Step 3.

And that's basically everything I did. If you want to, you can delete every file related to or named with 'pt-BR', just to be sure that it'll work. Again, I don't know if this is accurate, I'm not a specialist or anything haha. You can also delete the entire "itch" folder on Roaming and reinstall the app to see if it works!

Good luck, guys!!