KDE-linux system not updating with Discover and Konsole on desktop OK on laptop

KDE-linux system not updating with Discover and Konsole on desktop OK on laptop , both are

CPU and GPU “ Intel inside “ and 16 Gio of RAM.

In Discover after clicking “ Update “ the download starts normally but when it stops there is no invitation to restart no error message and no update either.

In Konsole “ updatectl update “ starts the download normally but when it stops it reads “ input / output error “

In both cases there is no information regarding the problem !

What do you think of that ?