I am running MacOSX Yosemite 10.10.5 and Office 2011 v14.5.6 (and Office 2016 v15.15.0)

Since having installed 14.5.6 and running Office365-v15.15.0 my Outlook-2011 does not startup any longer. I thought that the latest update 14.5.7 may solve this problem. But I cannot install this update. It says: A version which is needed for installing this update is not present on my machine ... sorry, this is nonsense.

Anyone else facing this problem? – any idea?

thx Jean Paul