its an app that you can download that specifically installs apk files (like the game file for android on this game) I personally downloaded Uptodown to install the game file but there's many other apk package installers!
I ended up downloading an apk package installer and that seemed to do the trick! it installed, so i think it may have just been an issue with the package installer that android has
I thought it could've been space too, so I deleted some stuff I didn't need, but before the most recent update, I had downloaded the game and everything was perfectly fine, no issues (and I had less available space at that time) so i don't know what it is.
