Recently, I tried to upgrade a DNN Professional environment which is hosted on a web farm (2 web servers) from DNN 7.2.0 to the most recent version 7.2.1 and the upgrade wizard (/install/install.aspx?mode=upgrade) showed the following NullReferenceException error in the middle of the upgrade process: Exception information: Exception type: NullReferenceException Exception message: Object reference not […]