How do I resolve this issue - #include expects "FILENAME" or <FILENAME>

Doing this for the first time and the IDE throws up the first line as the error above.
The include statement on my sketch is:

#include "Stepper.h"

with the error message.

first line and it does NOT work - how frustrating!!

Help please


Start here

The error message seems to offer two very clear options.


Full sketch and error messages please, otherwise we may be missing the true issue. You think
the error is about that first line, we will reserve judgement until we can see the whole sketch
and error messages verbatim (copy and paste exactly please).