Plugin ‘Assets/UnityAds/UnityEngine.Advertisements.Editor.dll’ has the same filename as Assembly Definition File ‘Packages/com.unity.ads/Editor/UnityEngine.Advertisements.Editor.asmdef’. Rename the assemblies to avoid hard to diagnose issues and crashes.
@asadmubashr It looks like you have a duplicate of Unity Ads package, one in Assets folder and another one in Packages. Try removing one from the Assets folder.