If you are running Cloudlinux, what is your Cloud Linux setting in the configuration? I have ran into this issue several times if it was set to CageFS. Once I switched it to LVE, everything returned to normal.
Sorry for this problem, i was found my problem. This problem by HDD Error.
So i have one more question for you: Can o reinstall LiteSpeed when i finish new Server (Same IP, OS...i replace with new HDD)
Or How to backup full installed config of LiteSpeed for new install?