Travel Mobile App doesn't compile with Xamarin Android on VS for Mac

=== Visual Studio Community 2019 for Mac (Preview) === Version 8.10 Preview (8.10 build 967) Installation UUID: 3029d778-8d8e-4eeb-bb91-d7e05a2193a7 GTK+ 2.24.23 (Raleigh theme) Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638) Package version: 612000137 === Mono Framework MDK === Runtime: Mono 6.12.0.137 (2020-02/b4a385816ed) (64-bit) Package version: 612000137 === Roslyn (Language Service) === 3.10.0-2.21169.30+7eb55689fac855d3fd8aeb5641128c61d0f349cc === NuGet === Version: 5.9.0.7134 === .NET Core SDK === SDK: /usr/local/share/dotnet/sdk/5.0.202/Sdks SDK Versions: 5.0.202 3.1.408 MSBuild SDKs: /Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/bin/MSBuild/Current/bin/Sdks === .NET Core Runtime === Runtime: /usr/local/share/dotnet/dotnet Runtime Versions: 5.0.5 3.1.14 === .NET Core 3.1 SDK === SDK: 3.1.408 === Xamarin.Profiler === Version: 1.6.15.68 Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler === Updater === Version: 11 === Apple Developer Tools === Xcode 12.4 (17801) Build 12D4e === Xamarin Designer === Version: 16.10.0.76 Hash: c12e77e7a Branch: remotes/origin/c12e77e7a755a2f14b3b1780e7ed7b114c8963c4 Build date: 2021-03-31 03:01:08 UTC === Xamarin.Android === Version: 11.2.99.192 (Visual Studio Community) Commit: xamarin-android/main/a9a7190 Android SDK: /Users/aaronlabeau/Library/Developer/Xamarin/android-sdk-macosx Supported Android versions: 8.1 (API level 27) SDK Tools Version: 26.1.1 SDK Platform Tools Version: 30.0.4 SDK Build Tools Version: 30.0.2 Build Information: Mono: eb4c311 Java.Interop: xamarin/java.interop/main@a3de91e ProGuard: Guardsquare/proguard/v7.0.1@912d149 SQLite: xamarin/sqlite/3.35.2@afa0437 Xamarin.Android Tools: xamarin/xamarin-android-tools/main@237642c === Microsoft OpenJDK for Mobile === Java SDK: /Users/aaronlabeau/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25 1.8.0-25 Android Designer EPL code available here: https://github.com/xamarin/AndroidDesigner.EPL === Android SDK Manager === Version: 16.10.0.8 Hash: 56a50f7 Branch: remotes/origin/HEAD Build date: 2021-03-31 18:48:48 UTC === Android Device Manager === Version: 16.10.0.9 Hash: 1a0a16f Branch: main Build date: 2021-03-31 18:49:14 UTC === Xamarin.Mac === Version: 7.11.0.247 (Visual Studio Community) Hash: c8b6bc6c8 Branch: main Build date: 2021-03-25 02:56:57-0400 === Xamarin.iOS === Version: 14.17.0.247 (Visual Studio Community) Hash: c8b6bc6c8 Branch: main Build date: 2021-03-25 02:56:58-0400 === Build Information === Release ID: 810000967 Git revision: 525f754d9b0ac298fa742fd03354ffa5b829a0df Build date: 2021-04-09 12:25:02-04 Build branch: release-8.10 === Operating System === Mac OS X 10.16.0 Darwin 20.3.0 Darwin Kernel Version 20.3.0     Thu Jan 21 00:07:06 PST 2021     root:xnu-7195.81.3~1/RELEASE_X86_64 x86_64