We appreciate you taking the time to report this error to us. However, there are still some details that we need to collect from you before we are able to investigate this properly. If you could please provide the following information, we will make sure that your report is looked into so we can try to resolve it.
*Are you able to add abilities to the bar using Gamepad/Mouse mode? (Under default control settings, you can enter this mode by pressing L1+R3)
*Are you attempting to set the actions through the Actions & Traits menu? Or by Holding a trigger and pressing SELECT?