Steam Save Not Working

I use the save option quite a lot since I get crashes sometimes, but after the update of the new S-Bahn route, I tried saving when playing that route and when my game crashed I found out the save option was gone, I loaded up another service, saved it and went back to the menu and it wasn't there

 

Ok found the problem, its a mod causing the problem, the save button still works

 

Glad you solved it but most of the time saves work but not all the time. If you want one example of when it does not work

I point to https://forums.dovetailgames.com/threads/bug-with-mixed-power-clinchfield-railroad.54431/

It is the way is for certain routes and activities (services or scenarios) as far as I know since TSW2.