Gone @

[Gunnar Gervin]

After update the @ disappeared from "Macintosh no dead keys" keyboard,
in Debian Buster i386 Buster 10.9 32bit UEFI
Any suggestions? The dollar sign is gone too.
I also have trouble with adding me in sudoers group, even though in Root a
message in the terminal said I was added, I cannot use the sudo command.
 Gunnar