The problem persists!
I know how to build rails and use the rail planner when it's functioning properly.
It seems to be related to mods.

I'm not sure. You know the red X curser that you get if you're trying to do an invalid build? I get that all the time. I can only place rails one at a time. No ...

The rail builder/planner fails in ghost and regular mode.
I can build straight rail tiles one at a time, including dragging and in ghost.
When I try to start a rail plan, click on arrow and left click to drag, the curser immediately shows red X. With or without holding shift.


Problem originated ...