Added A Blank C++ Class Into My Project And Now I Cant Use It

I tried to add a blank C++ Class into my project and now the project wont open, saying it needs to compile [ProjectName].dll
and when i try and compile it, it almost instantaneously fails.
and i cant generate the project files either,
as it gives me this error:

Running D:/UE4/UE_4.18/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project=“C:/Users/Alex/Documents/Unreal Projects/WW1Runner/WW1Runner.uproject” -game -rocket -progress
Discovering modules, targets and source code for project…
WARNING: D:\UE4\UE_4.18\Engine\Plugins\GameJoltPlugIn\Source\GameJoltPlugin\GameJoltPlugin.Build.cs: warning: Module constructors should take a ReadOnlyTargetRules argument (rather than a TargetInfo argument) and pass it to the base class constructor from 4.15 onwards. Please update the method signature.
While compiling C:\Users\Alex\Documents\Unreal Projects\WW1Runner\Intermediate\Build\BuildRules\WW1RunnerModuleRules.dll:
ERROR: c:\Users\Alex\Documents\Unreal Projects\WW1Runner\Intermediate\Source\WW1Runner.Target.cs(6,14) : error CS0101: The namespace ‘’ already contains a definition for ‘WW1RunnerTarget’
ERROR: UnrealBuildTool Exception: Unable to compile source files.

How can i get my project back to a blueprint-only project?

I have tried removing the GameJolt Plugin, but it gives me the same error, plugin or not. it even still says the warning with the plugin path!

and the project did not have the plugin enabled, nor did the game have a problem with the plugin before.

I need some help with this issue, Many thanks, Slendy.

It states that you have a fatal error in file c:\Users\Alex\Documents\Unreal Projects\WW1Runner\Intermediate\Source\WW1Runner.Target.cs at line 6, symbol 14. You have to address the error in question. It looks like a symbol name is being declared twice.

I don’t know how to revert back to blueprint-only project, but I will recommend that you make backups in the future. Also, I don’t advice using C++ unless you have some fair amount of experience with it or at least C# or Java.