Info ERROR: UBT ERROR: Failed to produce item: C:\Users\\Desktop\Sphinx_UE4_Demo\Binaries\Win64\UE4Editor-Sphinx_UE4_Demo-8911.dll

Hi,

I am trying to compile the c++ code from this project:A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums
But when I do I get these errors:

Info ERROR: UBT ERROR: Failed to produce item: C:\Users\Desktop\Sphinx_UE4_Demo\Binaries\Win64\UE4Editor-Sphinx_UE4_Demo-8911.dll

Error C:\Program Files\Epic
Games\UE_4.16\Engine\Source\Runtime\Engine\Classes\GameFramework/Character.h(500)
: error C3668: ‘ACharacter::Jump’:
method with override specifier
‘override’ did not override any base
class methods

I am compiling with visual studio community 2017 on ue4 4.16. How do I fix this?