Hi @floripaolo,
Thank you for your detailed message, and sorry for the late reply due to the weekend.
Yes, this event has to be linked to the page load workflow, when the user opens your app.
Sorry for this issue, we will fix this in the next update, for now, please insert a random text, the field will be ignored anyway. The error should disappear if you type a random test name.
Regarding the documentation, we are constantly working on it to fulfill with additional information. As well as I mentioned before, we will update the plugin, this will resolve these issues you are getting with unnecessary fields.
Thank you for understanding.
If you require any further information, feel free to contact me.
Best regards,