Looks like your problem is here:
kernel: [ 744.123969] efivars: set_variable() failed: status=-28
Which means your board is out of nvram and can't hold more boot configs.
Looks like your problem is here:
kernel: [ 744.123969] efivars: set_variable() failed: status=-28
Which means your board is out of nvram and can't hold more boot configs.