Lab error: Internal Server Error

I am getting below errors for over 2 days. Kindly help me to use lab.

500 : Internal Server Error

Failed to reach your server. Please try again later. Contact admin if the issue persists.

You can try restarting your server from the home page.

503 : Service Unavailable

Your server appears to be down. Try restarting it from the hub

Could you please check if you have not exceeded the disk quota in your home folder?