Steps to reproduce:

• go to "Developer" tab
• enable request inspector tool
• disable request inspector tool
• go to the main tab, and click on something (for example on a tree node), a javascript popup shows up, with a message like:

"Exception in org.ametys.servercomm.ServerComm._observer.onSyncRequestDeparture: TypeError: this.data is null"

More errors show up when the first popup is closed.

(spéciale dédicace à toute l'équipe Ametys, j'espère que tt le monde va bien :-P)