Game improperly saved, I need to recover it

The cloud will not let me access my game from my main device.

What happened was I needed to change layer order but the web application wasn’t letting me drag anything, so, I opened the file on my phone (Samsung S10 in case that helps). I did what I needed to do, and saved. But, my game uses tilemaps, and my phone app was very out of date. Because the phone didn’t know how to use tilemaps, and just assumed it did, the file is now corrupted.

I can still access it on my phone, however, deleting all the tilemaps hasn’t helped. I haven’t updated the app yet because I’m not sure if that will break it or not. I have 20 days before I have to trade in this phone (Part of a deal for a newer one), so time is limited.