Ошибка, обрабатывающая подписанный контейнером пакет

Я просто работаю, Кв. - получают обновление на моей установке Ubuntu 16.04, и я получаю эту ошибку:

Do you want to continue? [Y/n] Y
Setting up shim-signed (1.32~16.04.1+0.9+1474479173.6c180c6-1ubuntu1) ...
Installing for x86_64-efi platform.
grub-install: error: /boot/efi doesn't look like an EFI partition.
.
dpkg: error processing package shim-signed (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 shim-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

Вывод df -h

polesemi@pcsensori34:~$ df -h
Filesystem                                          Size  Used Avail Use% Mounted on
udev                                                7,8G     0  7,8G   0% /dev
tmpfs                                               1,6G  9,5M  1,6G   1% /run
/dev/sdb1                                           213G  135G   68G  67% /
tmpfs                                               7,8G  316M  7,5G   4% /dev/shm
tmpfs                                               5,0M  4,0K  5,0M   1% /run/lock
tmpfs                                               7,8G     0  7,8G   0% /sys/fs/cgroup
polesemi@login.dei.unipd.it:/home/polesemi          5,7T  2,1T  3,6T  37% /home/polesemi/homeDei
polesemi@login.dei.unipd.it:/nfsd/signet/ns/polese  475G  266G  210G  56% /home/polesemi/nsDei
tmpfs                                               1,6G  108K  1,6G   1% /run/user/1000

Вывод parted

polesemi@pcsensori34:~$ sudo parted -l
[sudo] password for polesemi: 
Model: ATA ST500DM002-1SB10 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      32,3kB  41,1MB  41,1MB  primary  fat16        diag
 2      41,9MB  12,6GB  12,6GB  primary  ntfs         boot, diag
 3      12,6GB  500GB   487GB   primary  ntfs


Model: ATA KINGSTON SHSS37A (scsi)
Disk /dev/sdb: 240GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End    Size    File system     Name  Flags
 3      1049kB  212MB  211MB   fat32           efi   boot, esp
 1      212MB   232GB  232GB   ext4
 2      232GB   240GB  8000MB  linux-swap(v1)

Что я могу сделать для фиксации его?Спасибо.