Cesium Error CS0111

Hello, I’m having an issue that looks like this:
error CS0111: Type ‘CesiumEditor’ already defines a member called ‘CesiumEditor’ with the same parameter types

This occurs for CesiumRuntime and namespace ‘’ as well.
It leads me to this file:
UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal_5.3\Source\CesiumEditor\CesiumEditor.Build.cs

But when i look into the CesiumEditor.Build.cs file I can’t seem to find any of these forementioned Types or anything like that.

Because of that i also can’t seem to debug any other code because it only shows me this error and nothing else.

Does anyone have any idea?