libicui18n.so.55: cannot open shared object file
Solution 1:
Looks like there is a problem with the libreoffice. This is a bug to me. The workaround:
wget http://security.ubuntu.com/ubuntu/pool/main/i/icu/libicu55_55.1-7_amd64.deb
sudo dpkg -i libicu55_55.1-7_amd64.deb
sudo apt-get -f install
rm libicu55_55.1-7_amd64.deb
Then, the problem is resolved.