Whenever I am starting my AEM instance it is showing me the "AuthenticationSupport service missing. Cannot authenticate request."

Please help me to fix this

Please help me to fix this
Hello @monish_gavali
You would be able to find many threads on AEL on the same issue. Sharing few of them. You would have to check them one by one to understand, whats causing 503 for you
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.