The "CreateAssetPack" task was not given a value for the required parameter "Source".

[rolfbjarne]

Repro by applying this diff:

diff --git a/tests/dotnet/MySimpleApp/iOS/MySimpleApp.csproj b/tests/dotnet/MySimpleApp/iOS/MySimpleApp.csproj
index 86d408734a..da99e53a0b 100644
--- a/tests/dotnet/MySimpleApp/iOS/MySimpleApp.csproj
+++ b/tests/dotnet/MySimpleApp/iOS/MySimpleApp.csproj
@@ -2,6 +2,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
        <PropertyGroup>
                <TargetFramework>net$(BundledNETCoreAppTargetFrameworkVersion)-ios</TargetFramework>
+               <CodesignKey>Apple Distribution: Luis Aguilera (DPXCPAGVTZ)</CodesignKey>
+               <CodesignProvision>WildCardiOSDistribution</CodesignProvision>
+               <EnableOnDemandResources>true</EnableOnDemandResources>
+               <BuildIpa>true</BuildIpa>
+               <RuntimeIdentifier>ios-arm64</RuntimeIdentifier>
+               <EmbedOnDemandResources>false</EmbedOnDemandResources>
        </PropertyGroup>
        <Import Project="..\shared.csproj" />
 </Project>

and then:

make build -C tests/dotnet/MySimpleApp/iOS

results in:

tools/msbuild/iOS/Xamarin.iOS.Common.targets(569,3): error MSB4044: The "CreateAssetPack" task was not given a value for the required parameter "Source".

binlog:
build-2024-03-22-175439.binlog.zip

Ref: https://developercommunity.visualstudio.com/t/MAUI-Net-Release-build-for-iOS-hangs/10615810#T-N10617287-N10617988

Workaround:

• Set EmbedOnDemandResources=true (or remove the property).