Unfortunately, the Ark server software does sometimes crash and there is nothing we, as a hosting company, can do about it. Your server will be automatically restarted within a few minutes and you'll be able to connect again. Unfortunately, anything you've done since the last save will be lost.
Here are some facts we know about Ark server crashing:
Sometimes a new Ark release have bugs that cause an unusually high number of crashes. When this happens, we'll usually see a fix a few days later.
The vast majority of crashes are due to problems with mods. Some mods are incompatible with new versions of the Ark server. Some mods are incompatible with each other. You could try disabling some mods to see if things get better.
The "last resort" is always to start with a clean slate: a whole new Ark server on our system. You can use our backup feature to restore one of your backups to the new server. Then see if that plays better before adding back any mods.