Error with EasyRoads

I have downloaded EasyRoads to unity. Before, it work slep in playmode, but now i can’t enter playmode the vakse is because it says that it is something wrong, but it is not something wrong. What pr how can that be fixed so i can make realistic driving-games again with roads without that error?

i have also 3 errors when i import easyRoads3D to my project

Assets/EasyRoads3D/Editor/RoadObjectEditorScript.js(1343,1): BCE0049: Expression ‘go’ cannot be assigned to.
Assets/EasyRoads3D/Editor/RoadObjectEditorScript.js(1488,1): BCE0049: Expression ‘go’ cannot be assigned to.
Assets/EasyRoads3D/Editor/RoadObjectEditorScript.js(1495,11): BCE0017: The best overload for the method ‘RoadObjectEditorScript.OQCQDCQQQQ(String, UnityEngine.Transform, EasyRoads3D.ODODDQQO, int, RoadObjectScript)’ is not compatible with the argument list ‘(String, System.Type, EasyRoads3D.ODODDQQO, Object, Object)’.