"HTTP Error 500.19" error while opening installed orchestrator

Getting below error after installing Orchestrator.

Notification BeginRequest

Handler Not yet determined

Error Code 0x80070021

Config Error 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”.

I hope the error is in the IIS server which you have hosted the orchestrator, Can you check if the application pool identity is set to default user in IIS server? @testing_mail

Please correct me if your orchestrator is hosted in some other server,

You can google the same error , you will have multiple reasons for the error and ofcourse answers too