This error occurs while clicking General setting of Web Application in SharePoint Central Administrator.
SharePoint Central Administrator >> Manage Web Applications >> Select Web Application (From List) >> General Settings >> General Settings.
Resolution:
Using Powershell Scripts ( SharePoint Management Shell):
Run this powershell script:
$web = get-spwebapplication http://SharepointUrl
$web.HttpThrottleSettings
$web.Update()
Kind Regards!