iOS "Append" not working with 2019.4.1f1.

New to unity here! I have created a new AR project today. cmd + B should build and run the project, and from my understanding that should append new data to the previous build folder, and that fails for me. Here's what Unity says:

 DirectoryNotFoundException: Could not find a part of the path '/Users/arshankhanifar/unity_projects/p1_getting_started_ar_foundation/build/ios/Unity-iPhone/Images.xcassets/LaunchImage.launchimage'.
 System.IO.__Error.WinIOError (System.Int32 errorCode, System.String maybeFullPath) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.FileSystemEnumerableIterator`1[TSource].HandleError (System.Int32 hr, System.String path) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.FileSystemEnumerableIterator`1[TSource].CommonInit () (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.FileSystemEnumerableIterator`1[TSource]..ctor (System.String path, System.String originalUserPath, System.String searchPattern, System.IO.SearchOption searchOption, System.IO.SearchResultHandler`1[TSource] resultHandler, System.Boolean checkHost) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.FileSystemEnumerableFactory.CreateFileNameIterator (System.String path, System.String originalUserPath, System.String searchPattern, System.Boolean includeFiles, System.Boolean includeDirs, System.IO.SearchOption searchOption, System.Boolean checkHost) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.Directory.InternalGetFileDirectoryNames (System.String path, System.String userPathOriginal, System.String searchPattern, System.Boolean includeFiles, System.Boolean includeDirs, System.IO.SearchOption searchOption, System.Boolean checkHost) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.Directory.InternalGetDirectories (System.String path, System.String searchPattern, System.IO.SearchOption searchOption) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.Directory.GetDirectories (System.String path) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.Directory.RecursiveDelete (System.String path) (at <fb001e01371b4adca20013e0ac763896>:0)
 System.IO.Directory.Delete (System.String path, System.Boolean recursive) (at <fb001e01371b4adca20013e0ac763896>:0)
 UnityEditor.iOS.PostProcessiPhonePlayer.UpdateInstallLocation (UnityEditor.iOS.PostProcessiPhonePlayer+ProjectPaths paths, UnityEditor.iOS.PostProcessiPhonePlayer+BuildSettings bs, UnityEditor.iOS.PostProcessiPhonePlayer+IncludedFileList includedFiles, UnityEditor.Build.Reporting.BuildReport buildReport) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:1467)
 UnityEditor.iOS.PostProcessiPhonePlayer.PostProcess (UnityEditor.iOS.PostProcessiPhonePlayer+BuildSettings bs, UnityEditor.iOS.PostProcessiPhonePlayer+ProjectPaths paths, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport buildReport) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:849)
 UnityEditor.iOS.PostProcessiPhonePlayer.PostProcess (UnityEditor.iOS.PostProcessorSettings postProcessorSettings, UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:679)
 UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/ExtensionModule.cs:45)
 Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
 UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/builduser/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/ExtensionModule.cs:49)
 UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at /Users/builduser/buildslave/unity/build/Editor/Mono/Modules/DefaultBuildPostprocessor.cs:27)
 UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:340)
 UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr) (at /Users/builduser/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:197)