Getting an error after restarting the server that "Possible reason is missing Repository service. Check AuthenticationSupport dependencies"

[#1]

Hi,

I restarted the server by stopping it, checked if any process is running and then started it again. It showed that it is started but the server is not up. I checked the logs and it shows the following error:

GET / HTTP/1.1] org.apache.sling.engine.impl.SlingHttpContext handleSecurity: AuthenticationSupport service missing. Cannot authenticate request.

org.apache.sling.engine.impl.SlingHttpContext handleSecurity: Possible reason is missing Repository service. Check AuthenticationSupport dependencies.

I checked the memory usage and it is fine(47% used)

Does anybody have an idea why this error is coming and why the server is not up?

[#2]

I'm getting this error on running, java -jar /tmp/oak-run-*.jar checkpoints /crx-quickstart/repository/segmentstore

Unable to access jarfile /tmp/oak-run-*.jar