[20210422_193250] I just updated the system with 'sudo pacman -Syu' and restarted the machine and fell in to above problem. I am new to Garuda and please help me with the solution.

You can update, in this way: pacman -Syu --ignore sddm or (preferred imo): pacman -Sy sddm-git && pacman -Syu But it is not said that all the problems in the world are linked to that problem there. I think you should also read well, if the above doesn’t work, the post linked by Jonathon.