Can't install LTS kernel 5.4

[Char]

My manjaro is with linux 5.8 kernel, Trying to install a LTS kernel 5.4 , I used Manjaro setting manager to install first the error occured and my laptop was on a freeze until I forcely turn it off after turning it on , it said process completed successfully (don’t know the exact word but process was executed successfully) And now I can’t see it on Grub Menu

[anon88624618]

You can install kernels using the command line:

sudo mhwd-kernel -i linux54

To really make sure grub gets updated:

sudo update-grub

[Char]

Thank you!!