[@giuseppecuttone Participant 11 years, 7 months ago]

Thank’s for your answer.
I have desactivated notification mail in setting => forum, and now there is no error message.

Now only there is the following problem:
With the other plugins notifications (group, comments and message notifications) when user does click in the notification, the notification redirect the user at the page with the post and the notification disappear.
With this plugin, when user does click notification no disappear. In order to do disappear the notification, user must to mark the REPLY like READED.

Do you know other plugin in order to send notification in the toolbar bubble?

Thank’s very very much for your support