UBuntu Studio 20.04.03 won't boot

More data:
ubuntu-studio@ubuntu-studio:/boot$ ls -l /boot
total 47026
-rw------- 1 root root 5807452 Oct 28 02:39 System.map-5.10.0-1051-oem
-rw------- 1 root root 5835487 Aug 11 09:53 System.map-5.11.0-27-lowlatency
-rw------- 1 root root 5863025 Oct 26 10:50 System.map-5.11.0-40-lowlatency
-rw------- 1 root root 4737414 Apr 20 2020 System.map-5.4.0-26-lowlatency
-rw-r--r-- 1 root root 251682 Oct 28 02:39 config-5.10.0-1051-oem
-rw-r--r-- 1 root root 253685 Aug 11 09:53 config-5.11.0-27-lowlatency
-rw-r--r-- 1 root root 254169 Oct 26 10:50 config-5.11.0-40-lowlatency
-rw-r--r-- 1 root root 237778 Apr 20 2020 config-5.4.0-26-lowlatency
drwxr-xr-x 3 root root 72 Aug 19 05:40 grub
lrwxrwxrwx 1 root root 26 Nov 20 16:46 initrd.img -> initrd.img-5.10.0-1051-oem
lrwxrwxrwx 1 root root 26 Nov 20 16:46 initrd.img.old -> initrd.img-5.10.0-1051-oem
-rw-r--r-- 1 root root 182704 Aug 18 2020 memtest86+.bin
-rw-r--r-- 1 root root 184380 Aug 18 2020 memtest86+.elf
-rw-r--r-- 1 root root 184884 Aug 18 2020 memtest86+_multiboot.bin
lrwxrwxrwx 1 root root 23 Nov 20 16:46 vmlinuz -> vmlinuz-5.10.0-1051-oem
-rw------- 1 root root 12563488 Oct 28 02:56 vmlinuz-5.10.0-1051-oem
-rw------- 1 root root 11783456 Oct 26 10:56 vmlinuz-5.11.0-40-lowlatency
lrwxrwxrwx 1 root root 23 Nov 20 16:46 vmlinuz.old -> vmlinuz-5.10.0-1051-oem

How did you try to install the 5.11.0-27 kernel?

Can you boot by selecting the 5.10.0-1051 kernel from the grub menu?

What output do you then get for the command
sudo update-grub

Just downloaded the distro and did an install wiping the disk and installing only Linux Studio on the system. How do you "select" the different kernel to load instead of allowing the distro to install the lowlatency one?
The system works fine when just selecting the "Try Studio" option. But after install it comes up with the error when I reboot for the install.
This output from the Try Studio install:
/usr/sbin/grub-probe: error: failed to get cononical path of `/cow`.

Did the install and then ran the command and get this output:
Same as above.

Question could the UEFI set to "ON" be the issue? I ask since I have this issue installing both the studio version and kubuntu???
Thanks for helping.

Sorry, I misinterpreted your text. I assumed that you can already boot into the system that is installed on the hard disk, but that seems not to be the case.

Both options - with and without UEFI - should work.

When installing - what did you select for the question about partitioning the hard disk, and what did you answer on the question where to install the boot loader?

Maybe you should try installing again, and make sure that you select the recommended values.
You might also try unselecting "download updates during install" and install updates only later.

I selected the 2nd option which installs the LVM and also selected the update during install. I did select the recommended values.
I am currently DLing Regular Ubuntu flavor which is on the system I am currently using and works fine - 20.04.03. I will use the recommended values and not use the "Update during the install.
Thanks. I'll let you know what happens.

I Selected the 1st option to just install the OS without the LVM and did NOT do the update during the install. It installed without incident and then I did the update packages afterward and no problem.
Thanks for the suggestions Manfred Hampl.