error: Visual Studio cannot debug because the debug target is missing
The error is saying that either the compile and build failed so that it did not create the .EXE specified or that it could not place it into the specified folder.
Can you use Windows Explorer and see if the location and file in the error message do exist?
If you had an error in the build it show be displayed in the Build Output window.
It looks like you are placing your project on a network share. I would recommend placing this on your local C drive instead.