Workaround:
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/fade-in/fade-in.plymouth 100
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/glow/glow.plymouth 100
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/script/script.plymouth 100
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/solar/solar.plymouth 100
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/spinfinity/spinfinity.plymouth 100
sudo update-alternatives --install /usr/share/plymouth/themes/default.plymouth default.plymouth /usr/share/plymouth/themes/spinner/spinner.plymouth 100
Workaround:
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ fade-in/ fade-in. plymouth 100
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ glow/glow. plymouth 100
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ script/ script. plymouth 100
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ solar/solar. plymouth 100
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ spinfinity/ spinfinity. plymouth 100
sudo update-alternatives --install /usr/share/ plymouth/ themes/ default. plymouth default.plymouth /usr/share/ plymouth/ themes/ spinner/ spinner. plymouth 100