Error: the following modules are missing/build with a different engine version, UE4Editor-Showcase.dll, fails to rebuild

So I went to open my project today and I’m getting this error.

‘The following modules are missing or build with a different engine version: UE4Editor-showcase.dll.’

It fails to rebuild and asks me to do it manually in Visual studio, so I try to generate C++ files and get this error.

‘Running D:/UE_4.18/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project=“D:/Unreal_4_projects/Unreal Projects/Showcase/Showcase.uproject” -game -rocket -progress
Discovering modules, targets and source code for project…
While compiling D:\Unreal_4_projects\Unreal Projects\Showcase\Intermediate\Build\BuildRules\ShowcaseModuleRules.dll:
ERROR: d:\Unreal_4_projects\Unreal Projects\Showcase\Intermediate\Source\Showcase.Target.cs(6,14) : error CS0101: The namespace ‘’ already contains a definition for ‘ShowcaseTarget’
ERROR: UnrealBuildTool Exception: Unable to compile source files.’

__I open up Showcase.Target.cs and the only code in it is this: __

using UnrealBuildTool;
using System.Collections.Generic;

public class ShowcaseTarget: TargetRules
{
public ShowcaseTarget(TargetInfo Target) : base(Target)
{
Type = TargetType.Game;

	ExtraModuleNames.Add("UE4Game");
}

//
// TargetRules interface.
//

public override void SetupGlobalEnvironment(
	TargetInfo Target,
	ref LinkEnvironmentConfiguration OutLinkEnvironmentConfiguration,
	ref CPPEnvironmentConfiguration OutCPPEnvironmentConfiguration
	)
{
}

}

Any Ideas?