I'm sorry you're having trouble. That is unfortunately some kind of compatibility or internet issue, I can't say for sure what it is. It could be:
-There's not enough space, even though it says there is
-You should try downloading through the Itch app instead of the webpage, or vice versa if you were already using the app
-You have a virus scanner that won't let the app install
-You have settings on that don't let third party apps install
-The internet connect isn't strong enough
-Something is going wrong with Itch itself
And things like that.
But also, some Android builds don't work with the Voiced Name version but do work with the Non-Voiced name version. I hope you're able to get it to work!