/dev/mapper/rhel-root doesn't exist

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Hello,
I was trying to increase my /dev/mapper/rhel-root size. I have available 136GB of free space. For testing, from GNOME disk graphical interface, I mounted ext4, 2 GB and then unmount it. I used pvresize --setphysicalvolumesize 1.8TB /dev/sda3 command to increase my /dev/sda3 from 1.7TB to 1.8TB. I have /dev/mapper/rhel-root, /dev/mapper/rhel-home, /dev/mapper/rhel-var, /dev/mapper/rhel-swap under /dev/sda3. After that I used lvextend -L+1G /dev/mapper/rhel-root to increase the root from 100GB to 101GB. At this point I reboot the system as the system got frozen. Now when starting the PC at the startup it complains /dev/mapper/rhel-root doesn't exist. I tried logging into the rescue mode and activate the sda3 filesystem but I can't activate the root but other 3 (home, var, swap) has activated. Can you suggest how can I fix the issue?

Thanks a lot for your time!

RM

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