If there’s nothing showing, try going into the System Preferences, to the Energy Saver settings and disable the sleep mode for both the display and the laptop. It will complain when you do this, and you WILL want to be mindful of it not going to low-energy use esp. when you’re on battery power – and see if it stops the issue.
Its might be worth executing a File System Consistency Check in Single User Mode
Boot Computer as Single-User:
File System Consistency Check:
If you want to disable sleep entirely, in Terminal:
sudo pmset sleep 0