Build Problem in Simplicity Studio

I’m following these instructions:

When I try to build the project, I get the error:
“…/edgeimpulse/edge-impulse-sdk/porting/silabs/ei_classifier_porting.cpp:26:10: fatal error: sl_stdio.h: No such file or directory”
and the build fails.

This is my folder structure. Does it seem to be okay?:

Also, there is no “Force Generation” button as the instructions say. Instead, there is a “Generate project report” button.

@ei_francesco can you please take a look at this one?