I'm getting assembly reference errors after importing 2018 particle pack

D:/UnityGames/Library/PackageCache/com.unity.package-manager-ui@1.9.11/Editor/Sources/UI/Common/PopupField.cs(8,36): error CS0246: The type or namespace name BaseTextElement’ could not be found. Are you missing an assembly reference?

D:/UnityGames/Library/PackageCache/com.unity.package-manager-ui@1.9.11/Editor/Sources/UI/Common/PopupField.cs(118,33): error CS0115: UnityEditor.PackageManager.UI.PopupField.ExecuteDefaultAction(UnityEngine.Experimental.UIElements.EventBase)’ is marked as an override but no suitable method found to override

Same for me, did you found a solution ? I will tell you if I find anything. :slight_smile: