encblog: could not load Perl modules Image::Magick nor GD:

ImageMagick error was:
Can't locate Image/Magick.pm in @INC (you may need to install the Image::Magick module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.28.1 /usr/local/share/perl/5.28.1 /usr/lib/x86_64-linux-gnu/perl5/5.28 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.28 /usr/share/perl/5.28 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at recipes.cgi line 8662.

GD error was:
Can't locate GD.pm in @INC (you may need to install the GD module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.28.1 /usr/local/share/perl/5.28.1 /usr/lib/x86_64-linux-gnu/perl5/5.28 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.28 /usr/share/perl/5.28 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at recipes.cgi line 8666.

To use the image features, you must install the Perl module(s) Image::Magick (perlmagick) and/or GD on your server.  Contact your server administrator / hosting company and ask them to install these Perl modules.  Or, if you have root access to your server, you can install them yourself by running these commands:

# perl -MCPAN -e 'install Image::Magick'

# perl -MCPAN -e 'install GD'

Alternatively, you can just disable the image features, as listed below:

$PREF{enable_human_test}