Error "This configuration section cannot be used at this path" when launching EngageOne Content Author web client

Product Feature: Installation / Upgrade

Operating System: Windows Server 2012

Configuration: IIS


When trying to launch Web Client of EngageOne Content Author in Windows Server 2012, the following IIS error is thrown:
"This configuration section cannot be used at this path. this happens when the section is locked at a parent level. locking is either by default overrideModeDefault="Deny" or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false""


"Deny" value set to the parameters mentioned in the error message.


UPDATED: July 8, 2019
  1. Browse to “C:\Windows\System32\inetsrv\config” (you will need administrator rights here) and open applicationHost.config file.
  2. Find the section that showed up in the “config source” part of the error message page (typically “modules” or “handlers”).
  3. Change the overrideModeDefault attribute to be “Allow”.  The whole line now looks like: "<section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Allow" />"