Not able to start ambari services

[#1]

I installed Hortonworks Sandbox via Virtualbox. And when i started ambari every service is stopped like you can see in this screenshot . I tried to start manually each of the service but nothing happens when i click the start button. And plus, i have many erros in my alert section as you can see in this folder. Any idea on how i can resolve this?

[#2]

I installed Hortonworks Sandbox via Virtualbox. And when i started ambari every service is stopped like you can see in this screenshot . I tried to start manually each of the service but nothing happens when i click the start button. And plus, i have many erros in my alert section as you can see in this folder. Any idea on how i can resolve this?

[#3]

@emeric Can you share the ambari agent logs or take a look of respective role logs to get better understanding. You can see if hosts are in the contact with Ambari and not having any issue.  

[#4]

Here is what my amabri agent logs  look like. I don't understand anything.