In case you installed ROCK with UEFI enabled you may get into the exact problem you described. In No automatic ROCK update from 254 to 256, though running with UEFI on NUC8 you will likely find the solution.
Cheers
In case you installed ROCK with UEFI enabled you may get into the exact problem you described. In No automatic ROCK update from 254 to 256, though running with UEFI on NUC8 you will likely find the solution.
Cheers