![AEM 503 Service Unavailable](https://binarycipher.dev/wp-content/uploads/2022/09/image-1.png)
![AEM 503 Service Unavailable](https://binarycipher.dev/wp-content/uploads/2022/09/image-1.png)
While starting AEM getting below error 503 service unavailable.
![](https://binarycipher.dev/wp-content/uploads/2022/09/image-1.png)
![](https://binarycipher.dev/wp-content/uploads/2022/09/image-1.png)
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
![](https://binarycipher.dev/wp-content/uploads/2022/09/image-2.png)
![](https://binarycipher.dev/wp-content/uploads/2022/09/image-2.png)
Ref: https://experienceleague.adobe.com/docs/experience-manager-65.html