For the actual solution, skip to the last paragraph, because first I was on a goose chase here. On my fifth generation NUC (NUC5i3RYH) from 2015 the CMOS battery went dead. The BIOS complained that time is not set and such.So I went to look for a replacement battery. After Lees verder
Nsure energielezer en de Thuisapp van Essent werken niet meer sinds november 2020.