Search keywords doesn’t work ?

Hi !

I just tried WP Power Stats for few hours and it seems that it doesn’t collect search keywords for some reasons.
Anyone else experience this issue ?

https://image.noelshack.com/fichiers/2018/05/3/1517430076-wp-power-stats.png

Thanks.