Error: "Assembly with name 'UnityEditor.StandardEvents' already exists (Packages/com.unity.standardevents/Editor/Editor.asmdef)"

Question

I just updated my unity to 2018.1.0f2 and it is giving me this error: "Assembly with name 'UnityEditor.StandardEvents' already exists (Packages/com.unity.standardevents/Editor/Editor.asmdef)" Any idea what I should be doing to avoid this.

Answer 1

remove all foder in project but keep folder asset and project setting, *.sln