Looks like your cron jobs ran and it overloaded your hosting. That, or whatever mod (I believe it's a chatbox) misc.php?show=ccbmessages. Disable whatever mod uses that url. Most likely your hosting account can't handle the resources required to run that modification.
Yes, that's it.
https://vborg.vbsupport.ru/showthread.php?t=177552
Disable Cyb's chatbox and see if the problem persist. Chatboxes use a lot of resources if you have many members participating in it at once.