После ввода ваших команд в терминал, он показал следующее:
Can't locate JSON/XS.pm in @INC (you may need to install the JSON::XS module)
(@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.30.0 /usr/local/share/perl/5.30.0 /usr/lib/x86_64-linux-gnu/perl5/5.30 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.30 /usr/share/perl/5.30 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at /usr/bin/gk line 26.
BEGIN failed--compilation aborted at /usr/bin/gk line 26.