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".

You will get this error when your not defined Features Delegations correctly  in the IIS . 

Solution :

You can Fix the issue by configuring the Feature delegation as specified below

-> Got to IIS

-> Go to Features View

->Click on the Feature Delegation

->Update the  Below values  with New Delegations

Name	Old Delegation	New Delegation
Authentication-Anonymous	Read\Write	Read only
Authentication- Windows	Read\Write	Read only
Logging	Not delegated	Read\Write
Advanced Logging		Not Delegated

Now restart the IIS 

You can find more information  from here