I'm currently making stickers in iOS for a project at work. Today I pushed a new build for testing and got the error CFBundleVersion Mismatch.
If you ever happen to get this it's probably because your StickerPackExtension.appex has a different Bundle ID than the overall project. You need to change them both. Updating only the project build version doesn't "cascade" into other areas.
I've recently started using Git. I don't know my way around it that well. But I find the idea of it kind of fascinating.
Part of this was figuring out if it was useful for editing things here on tilde.town.
Turns out that's pretty easy. Make a folder on the server. Initialize a new repository with some flags locally. Then scp it up to the folder you made on tilde.town.