what happen?

can't load the 92 line map

Change the radio button to "without buses". The error says that there is no save of the last situation on the map - I assume it's your first ride.

I have the same problem, but if I put the button without buses, then there is the following mistake:
http://upload.ct-verkehr.de//bild.php/10562,unbenanntQZTDI.png

I know its the Editor, but the same mistake in the game is ther still

Maybe it's this?

https://omnibussimulator.forumieren.com/t1677-this-could-be-the-reason

No

how to add more bus in the route

At the menu in the game click on the left button NEW...

i also have this problem
how can i solve this problem?