Latest log is a file that allows people to see the logs of every event when the server was turned on and before it was shutdowned, it doesn't affect if the server can turn on whatsoever.
If the tick speed is still 1 billion, then go to your console and set the tick speed to about 20. If you can't turn the server on due to overload, then reset the entire server in the danger zone section of the panel.
Mark this post as resolved if my suggestion worked.