I have a Xamarin Forms project for an iOS App which is failing to build on App Center. I don't have any issues building locally in Visual Studio, nor even with running the app on my own iPhone. It has in fact never succeeded in building on App Center. The error seems to be with an open source project which I included the source code for, and have made some changes to.
I have looked over the dependencies for the project and made sure my entire codebase is checked into my git repo, but I can't figure out what's going wrong. This is my first Xamarin Project, so I'd appreciate some help/guidance with figuring out what's wrong if possible. I've attached a text file containing the build output.