For the developers out there :
I recently installed Dynamo 9.1 and then my Revit Quick Access toolbar went missing or is turned white. If I set the QAT below the ribbon its fine. Also Uninstalling Dynamo solves the missing QAT issue.
I uninstalled and install Dynamo a couple of times but same issue.
Below is the 2 screenshots. Of Dynamo installed and uninstalled.
Im using Win10 and latest Revit 2016.