HTTP ERROR 503 Service Unavailable on AEM Start

While starting AEM getting below error 503 service unavailable.

HTTP ERROR 503 AuthenticationSupport service missing. Cannot authenticate request.
URI:	/
STATUS:	503
MESSAGE:	AuthenticationSupport service missing. Cannot authenticate request.
SERVLET:	org.apache.felix.http.base.internal.dispatch.DispatcherServlet-7491d8d5

Fix:

• Stop the server
• Navigate to the server path: C:\aem65_12\crx-quickstart\launchpad\config\org\apache\sling\jcr
• Find the folder repoinit
• rename or delete the folder which has the repo initialization configs
• Restart the server

Ref: https://experienceleague.adobe.com/docs/experience-manager-65.html