Helper function not found in trigger word detec

You must have somehow damaged your notebook. Maybe deleted one of the cells or perhaps converted that code cell into “markdown” accidentally. I just got a clean copy of that notebook and that function is provided in the template code. Please get a fresh copy and compare, using the method described here.

Well either that or maybe the simpler explanation is just that you haven’t run that cell yet. This is course 5, so you should be pretty familiar with how the notebooks work by now.