What platform are you on?
This seems to be an issue with the itch.io app (see this dicussion). Retry installing a couple of times, and if it does not work, we suggest downloading it from the itch.io website in a browser.
This seems to be an issue with the itch.io app (see this dicussion). Retry installing a couple of times, and if it does not work, we suggest downloading it from the itch.io website in a browser.