MS Visual c++ "The number of source files and corresponding outputs must match"

I'm trying to compile my code on c++ in msVisual2019 but I get an error at every try:

Severity Code Description Project File Line Suppression State Error MSB6001 Invalid command line switch for "CL.exe". System.ArgumentException: The number of source files and corresponding outputs must match. at Microsoft.Build.Shared.ErrorUtilities.ThrowArgument(Exception innerException, String resourceName, Object[] args) at Microsoft.Build.Utilities.CanonicalTrackedOutputFiles.RemoveDependenciesFromEntryIfMissing(ITaskItem[] source, ITaskItem[] correspondingOutputs) at Microsoft.Build.CPPTasks.CL.PostExecuteTool(Int32 exitCode) at Microsoft.Build.CPPTasks.TrackedVCToolTask.ExecuteTool(String pathToTool, String responseFileCommands, String commandLineCommands) at Microsoft.Build.Utilities.ToolTask.Execute() HelloWorld C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets 687

This first happened after I created (on accident) a header file inside "Source Files" (img attached), compiled it, then realized my mistake and placed it back in "Header Files". Now every time I build it, even after every change I make... I can't get this error to go away and haven't found a solution to a similar problem yet. Any help would be greatly apreciated, thanks.

[mistake, build after][1]
[correction, build after][2]
[errors displayed][3]
  [1]: https://i.sstatic.net/SDAzP.png
  [2]: https://i.sstatic.net/PG54S.png
  [3]: https://i.sstatic.net/ZhEsH.png

Solution

Preprocess to a File doesn't seem like a good idea according to its description: This option suppresses compilation... I'm glad you set it to No. – rturrado Jul 10 at 21:04 Thanks @rturrado :D