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!