Info.plist Utility Error: "Info.plist couldn't be opened because there is no such file"

I'm running into what seems to be common error, in that Xcode can't seem to find my 'Info.plist' file.

I've checked the answers to these two StackOverflow questions (Could not read from Info.plist and Objective C/Xcode error: The file “Info.plist” couldn’t be opened because there is no such file)...I am using a relative path, and the plist file is in the correct absolute location. The type and location are correct as shown in the image below:

My biggest concern is that this is now happening on multiple projects, including one I ran successfully just a few hours ago! Does anyone know how to solve this???

EDIT I've also tried reinstalling XCODE and replacing the plist file. Xcode still can't find 'info.plist'.

NOTE I wanted to add that this was for Xcode 6.2.X (I can't remember which version number exactly, but it was pre-Xcode 6.3.X).

The solution for this particular instance of the error was “Info.plist couldn't be opened because there is no such file” was that I had deleted all of the files in the "Project Tests" folder, but was still had "Project Tests" listed under my targets. After deleting the "tests" target, the project built successfully.