Error "Updates are currently disallowed in GET requests. To allow updates on a GET, set the 'AllowUnsafeUpdates' property on SPWeb".

You may encounter an exception when accessing General Settings or Resource Throttling for a web application in Central Administration:

Solution:

Open SharePoint Management Shell and execute the below commands:

$w = get-spwebapplication http://<web application url>

$w.HttpThrottleSettings

$w.Update()