Xaml Trimming fails with locked file

[jeromelaban]

I have this section in my project file

	<PropertyGroup Condition="'$(Configuration)'=='Release'">
		<DefineConstants>$(DefineConstants)</DefineConstants>
		<NoWarn>$(NoWarn);IL2008;IL2026;IL2041;IL2057;IL2067;IL2070;IL2072;IL2075;IL2078;IL2087;IL2104</NoWarn>
		<RunAOTCompilation>true</RunAOTCompilation>
		<WasmPWAManifestFile>manifest.json</WasmPWAManifestFile>
		<WasmShellWebAppBasePath>/app/wasm/Latest/wwwroot/</WasmShellWebAppBasePath>
		<UnoXamlResourcesTrimming>true</UnoXamlResourcesTrimming>
		<WasmShellILLinkerEnabled>true</WasmShellILLinkerEnabled>
	</PropertyGroup>

... which throws these errors

... and here is the BINLOG
msbuild.zip

Originally posted by @DierkDroth in #18778 (reply in thread)