I'm also seeing this error on 20.04 x86_64 in the UK.
The workaround in #6 almost worked; I needed version 3.8 instead of 3.6. I.e. the commands were:
wget http://ftp.de.debian.org/debian/pool/contrib/m/msttcorefonts/ttf-mscorefonts-installer_3.8_all.deb sudo dpkg -i ttf-mscorefonts-installer_3.8_all.deb
I'm also seeing this error on 20.04 x86_64 in the UK.
The workaround in #6 almost worked; I needed version 3.8 instead of 3.6.
I.e. the commands were:
wget http:// ftp.de. debian. org/debian/ pool/contrib/ m/msttcorefonts /ttf-mscorefont s-installer_ 3.8_all. deb -installer_ 3.8_all. deb
sudo dpkg -i ttf-mscorefonts