Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
sed: impossible de lire /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth: Aucun fichier ou dossier de ce type
E: /usr/share/initramfs-tools/hooks/plymouth failed with return 2.
Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
sed: impossible de lire /usr/share/ plymouth/ themes/ ubuntu- text/ubuntu- text.plymouth: Aucun fichier ou dossier de ce type initramfs- tools/hooks/ plymouth failed with return 2.
E: /usr/share/
This is a duplicate of bug #1532355.