moc: Too many input files specified:

I just started getting a moc error for a project that worked for months.  I don't know the cause or how to fix it.  I uninstalled/reinstalled Qt, Visual Studio and the plugin.  Nothing has worked.

 I did not change any configuration before this started happening. 

The full path to the project does have spaces

C:\Users\drogers\Documents\Visual Studio 2010\Projects\ImageViewers\Phot

However, other Qt projects in that folder compile correctly and this has worked before.

The example project works fine in this directory.

 C:\Users\drogers\Documents\Visual Studio 2010\Projects\ImageViewers\Phot\test\hellovulkanwidget

I use Perforce and it did not indicate the project was changed when the error started to occur. 

1>------ Build started: Project: Phot, Configuration: Debug x64 ------
1>moc Phot.h
1>moc EditorManager.h
1>moc ..\QtAsync\include\thinkerqt\signalthrottler.h
1>moc ..\QtAsync\include\thinkerqt\thinkerbase.h
1>moc ..\QtAsync\include\thinkerqt\thinkermanager.h
1> moc: Too many input files specified: 'C:\Users\drogers\Documents\Visual Studio 2010\Projects\ImageViewers\Phot\Phot.h' 'Studio' '2010/Projects/ImageViewers/Phot/Debug/x64/obj/Phot/qmake/temp\"'
1> Usage: C:/Qt/5.15.1/msvc2019_64/bin/moc [options] [header-file] [@option-file] [MOC generated json file]
1> Qt Meta Object Compiler version 67 (Qt 5.15.1)

It does this for every Qt header file.  I am blocked by this.