Question Waypoints

Hi all. I have a big city with a traffic, pedestrian system. I used Simple Traffic System for traffic system, Simple Waypoint System for pedestrians. Everything has been working fine. I haven't changed anything for several months. Today I need to make some changes and I noticed that all my routes, splines and waypoints are invisible. Cars are moving, pedestrians are walking, but nothing is visible in scene view. I tried to create a new route, but I can't put any waypoints. I loaded other assets with the waypoint system and it's the same, I can't put any waypoints. I opened a new project and everything works fine, but in my main project none of the assets work.

Please help me, I don't know when this happened, maybe I changed some settings.
The problem is that I can't put waypoints on terrain or plane or cube or then and then.

 

I found a solution. I just accidentally turned off gizmos.