Freepbx Services Stop

So in essence I installed a new FreePBX, and its great considering I just moved from Elastix 4.0 after it failed on me. Definitely a lot of audio and sound issues we were having before have been fixed, but the one thing that seems to happen continually is that I am working and configuring FreePBX through its gui, but after a while it times out and gives me a “503 Service unavailable, The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later” on port 443. Not only that but all the services go down as well, such as asterisks, and all of its related services. In short words, the server completely stops working. I was wondering what this might be, and how it might be fixed.

The weird thing is that Apache still works cause if I input my IP address for port 80 it redirects to the welcome to apache page with no problems.