Ernest, hope you are doing great.
Perfect! It works now. I saw the same thing as you did when I tested. When I entered an empty phrase the plugin returned me results from all subsites. But when I searched something in particular like “Gala” for example, it didn’t returned anything.
Doesn’t matter tho, because it works now!
Finally, the custom code works fine. It returns all events in that category.
Thank you once more for the help. Have a nice week!