Steps to reproduce: - Install e-Commerce - Go to your portal into a quotation - Go to the chatter and send an empty message Issues: A traceback is shown Solution: Catch the error and discard it as the parent method is already displaying the error message to the user. opw-3877096 closes odoo/odoo#162424 Signed-off-by: Mattis Megevand (mmeg) <mmeg@odoo.com>