I was trying to determine why AppVeyor was failing to build my dotnet project, even after adding both nuget restore and dotnet restore in the prebuild script.

Project:
https://ci.appveyor.com/project/kornman00/vita

Attached is MSBuildDetailed.txt, which is the output I get locally when building my project with VS2022.

Attached is AppveyorOutput.txt where it failed with:
error NETSDK1004: Assets file 'C:\projects\vita\_obj\v170\KSoft\Debug\AnyCPU\project.assets.json'

But digging deeper we can see:

[00:00:13] nuget restore
...
[00:00:32] Writing assets file to disk. Path: C:\projects\vita_obj\v170\KSoft\Debug\Any CPU\project.assets.json
...
[00:00:37] dotnet restore
...
[00:00:44] C:\projects\vita\Vita.sln.metaproj : message : Property 'Configuration' with value 'Debug' expanded from the environment.
[00:00:44] C:\projects\vita\Vita.sln.metaproj : message : Property 'Platform' with value 'Any CPU' expanded from the environment.
...
[00:00:45]   Building solution configuration "Debug|Any CPU".
...
[00:00:45] Property reassignment: $(Platform)="AnyCPU" (previous value: "Any CPU") at

nutget restore used a path that had Any CPU with a space. When msbuild in appveyor ran, there was a property reassignment to change Platform to AnyCPU without a space and this caused failures further down.

I am using the web interface to configure the project settings and there's no way to set/select Platform as "AnyCPU". I imagine I can possibly work around this with an appveyor.yml in my git, but I thought this worth pointing out as this very much seems like a compatibility problem on the Appveyor side when compared against out of the box behavior in Visual Studio.