While running my AEM Jar I am getting the error

[Ronnie09]

I am getting below error HTTP ERROR 503 ServletResolver service missing, cannot service requests I have to run the instance anyhow. Please, anyone, help

[Jörg_Hoh · Accepted solution]

Have you used the search function of the forum already? Questions around this error message seem to be raised quite often.

https://experienceleaguecommunities.adobe.com/t5/custom/page/page-id/GlobalSearch#q=ServletResolver%...

In case the mentioned responses don't solve your problem, please follow up on this post again, and specify what you have already tried.

[HeenaMadan]

Check whether your Apache Sling Authentication Service Bundle is active or not. Go to http://localhost:4502/system/console/bundles and verify. If it is not active then try to activate it manually.

If the bundle is active and you still get the issue then other solution is to re-index your repository.

Refer this https://cqdump.joerghoh.de/2022/03/17/how-to-analyze-authentication-support-missing/