As far as I recall, this could be the issue with incredibuild. Are you using it? Can you check under user\AppData\Roaming\Unreal Engine\UnrealBuildTool file named BuildConfiguration.xml and you can try to add the following
<Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
<BuildConfiguration>
<bAllowXGE>false</bAllowXGE>
</BuildConfiguration>
</Configuration>
If that does not work, first revert the BuildConfiguration.xml, and try to “reset-clean” your project by deleting following directories: Binaries, Build, Intermediate and Saved. After that, delete .sln file, right click on your project file and choose “Generate Visual Studio Project Files”. Just to be safe, you can “move” directories / .sln file, instead of deleting them. Then try again and let us know if it fixed it.