Major issues making new solution

I am unable to build or even save a new solution on the newest userkit. I had to reinstall everything (VS 2017, Windows, etc.) on my computer a few days back due to an unrelated issue and I haven’t been able to get Cosmos working since. I have applied the fix to Cosmos.targets from #744.

When building a new solution I get the following output:

Solution is not saved. Please save your solution before managing NuGet packages.
NuGet package restore failed.
1>------ Build started: Project: CosmosKernel1, Configuration: Debug Any CPU ------
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(4,20,4,26): error CS0400: The type or namespace name 'System' could not be found in the global namespace (are you missing an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(14,12,14,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(15,12,15,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(16,12,16,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(17,12,17,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(18,12,18,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(19,12,19,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(20,12,20,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(21,12,21,18): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(4,71,4,98): error CS0518: Predefined type 'System.String' is not defined or imported
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(4,100,4,120): error CS0246: The type or namespace name 'FrameworkDisplayName' could not be found (are you missing a using directive or an assembly reference?)
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(4,123,4,125): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(14,55,14,70): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(15,61,15,68): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(16,59,16,80): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(17,59,17,68): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(18,68,18,75): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(19,55,19,70): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(20,53,20,68): error CS0518: Predefined type 'System.String' is not defined or imported
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(21,55,21,64): error CS0518: Predefined type 'System.String' is not defined or imported
1>Kernel.cs(4,13,4,19): error CS0246: The type or namespace name 'Cosmos' could not be found (are you missing a using directive or an assembly reference?)
1>Kernel.cs(1,7,1,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>Kernel.cs(2,7,2,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>Kernel.cs(3,7,3,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(2,7,2,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>C:\Users\dsdud\AppData\Local\Temp\.NETStandard,Version=v1.5.AssemblyAttributes.cs(3,7,3,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(11,7,11,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>obj\Debug\netstandard1.5\CosmosKernel1.AssemblyInfo.cs(12,7,12,13): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
1>Kernel.cs(10,28,10,32): error CS0518: Predefined type 'System.Void' is not defined or imported
1>Kernel.cs(15,28,15,32): error CS0518: Predefined type 'System.Void' is not defined or imported
1>Kernel.cs(10,33,10,42): error CS0115: 'Kernel.BeforeRun()': no suitable method found to override
1>Kernel.cs(15,33,15,36): error CS0115: 'Kernel.Run()': no suitable method found to override
1>C:\Program Files\dotnet\sdk\1.1.0\Sdks\Microsoft.Net.Sdk\build\Microsoft.NET.Sdk.targets(92,5): error : Assets file 'C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\obj\project.assets.json' not found. Run a NuGet package restore to generate this file.
1>Done building project "CosmosKernel1.csproj" -- FAILED.
2>------ Build started: Project: CosmosKernel1Boot, Configuration: Debug Any CPU ------
2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(1987,5): warning MSB3245: Could not resolve this reference. Could not locate the assembly "System.Core". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.
2>	Invoking il2cpu.exe "DebugEnabled:True" "StackCorruptionDetectionEnabled:False" "StackCorruptionDetectionLevel:" "DebugMode:Source" "TraceAssemblies:" "DebugCom:1" "UseNAsm:True" "OutputFilename:C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\bin\Debug\net462\CosmosKernel1Boot.asm" "EnableLogging:True" "EmitDebugSymbols:True" "IgnoreDebugStubAttribute:False" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Core.Plugs.Asm.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Core.Plugs.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Debug.Kernel.Plugs.Asm.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.System.Plugs.dll" "References:C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\bin\Debug\netstandard1.5\CosmosKernel1.dll" 
2>C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Build\VSIP\Cosmos.targets(39,5): error : Error occurred while invoking IL2CPU.
2>	Executing command line "C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Build\IL2CPU\IL2CPU.exe" "DebugEnabled:True" "StackCorruptionDetectionEnabled:False" "StackCorruptionDetectionLevel:" "DebugMode:Source" "TraceAssemblies:" "DebugCom:1" "UseNAsm:True" "OutputFilename:C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\bin\Debug\net462\CosmosKernel1Boot.asm" "EnableLogging:True" "EmitDebugSymbols:True" "IgnoreDebugStubAttribute:False" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Core.Plugs.Asm.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Core.Plugs.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.Debug.Kernel.Plugs.Asm.dll" "References:C:\Users\dsdud\AppData\Roaming\Cosmos User Kit\Kernel\Cosmos.System.Plugs.dll" "References:C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\bin\Debug\netstandard1.5\CosmosKernel1.dll" 
2>	Working directory = 'C:\Users\dsdud\AppData\Local\Temporary Projects\CosmosKernel1\bin\Debug\net462\'
2>	Loaded : DebugEnabled
2>	Loaded : StackCorruptionDetectionEnabled
2>	Loaded : DebugMode
2>	Loaded : StackCorruptionDetectionLevel
2>	Loaded : TraceAssemblies
2>	Loaded : DebugCom
2>	Loaded : UseNAsm
2>	Loaded : OutputFilename
2>	Loaded : EnableLogging
2>	Loaded : EmitDebugSymbols
2>	Loaded : IgnoreDebugStubAttribute
2>	Loaded : References
2>	Loaded : AdditionalSearchDirs
2>	Loaded : AdditionalReferences
2>	Executing IL2CPU on assembly
2>	Error: No Kernel found!
2>	Errorred
2>	IL2CPU invoked with DebugMode='Source', DebugEnabled='True',StackCorruptionDetectionLevel='{NULL}', TraceAssemblies='{NULL}', IgnoreDebugStub='False'
2>	IL2CPU task took 00:00:02.7742373
2>Done building project "CosmosKernel1Boot.Cosmos" -- FAILED.
2>
2>Build FAILED.
========== Build: 0 succeeded, 2 failed, 0 up-to-date, 0 skipped ==========

Additionally, upon trying to save the new solution, Visual Studio displays an error that reads: “The operation could not be completed. No such interface supported.”

[dsdude123]

Found a workaround for this issue, it turns out that “Save new projects when created” located in Options>Projects and Solutions>General was disabled and as a result the Cosmos project was being created as a temporary project and the restore failed as a result. Enabling this option fixes the issue.

Alternatively, adding <PromptForSaveOnCreation>true</PromptForSaveOnCreation> to the Visual Studio Templates for Cosmos should also fix the issue according to the MSDN although I have not tested this.

[dsdude123]

@LegitSoulja My issue of missing assemblies was being caused by the save issue because NuGet cannot perform a restore unless the project was saved. This is now fixed in the devkit (https://github.com/CosmosOS/Cosmos/commit/3dbb8678c49e14934ec9525d53b716ca4231534a), please open a new issue as for it is unrelated to this one. Either that or you have applied the fix for userkit incorrectly. Issue closed.