Missing road markers and strange terrain ¡Please help!

I have been using the EasyRoads3D for some time but I don't know what I did wrong that from one moment to another it started to act strangely, the terrain became a bit transparent and I can see the grid. Also, if I reload something like the scene or the editor, the road markers disappear no matter how much I have selected the road network, I have deleted and created new networks and it is repaired but every time there is a change it disappears again, this time I have advanced a lot and I don't want to have to erase the network again to start over, can anyone help me continue?

[1]: /storage/temp/152102-captura-de-pantalla-1-50.png