dracut Warning: Can't mount root filesystem (after update and reboot)

Hi. Centos Web Panel is excellent. I'm very happy with it.

I have a problem. Yesterday morning I updated CWP on my VPS. There was some issues but after some steps I did almost all worked well. Only SSL certificates (Letsencript) didn't work. Suddenly at the afternoon system got slow then I decided to reboot the server. After that it didn't run any more. I already notified my ISP too. I attached an image with the details. Thank you in advance.

One more thing. After update. disk space was just 1.5 GB. I must to delete update folder in order to gain space but with the issues I had I forgot it and didn't do it. Now I can't remember what's the folder I have to delete. I don't know if low disk space could cause current issues. Take it into account, please. Thanks again.

you need to check this issue with your server provider since this is a boot issue

OK. I did it. I'm waiting for a feedback.