Would like to know what I need to do to correct this problem. As well, my knowledge of the Linux OS is less than novice. I know enough to setup a server, install modules, etc. but not more than that.
To help troubleshoot this, when you get to the screen where you select the previous kernel, instead highlight the 6.8.0-51 kernel and press “e” key to edit its boot options. At that screen, delete the boot parameters quiet and splash if present. Then boot with these modified parameters by pressing Ctrl-X. Do you now see any related messages on screen when the system doesn’t load properly?