How did you recreate EFI partition?
Before the OS Update.
Mount EFI Partition
Backup - Copy the partition in a backup folder on my desktop
Remove all files from the EFI Partition
With MultiBeast using the QuickStart option and select the Ethernet an sound driver
it recreates the EFI files in EFI partition.
Then using Clover Configurator I was able to update to the lastest version using the install/Update Clover
I was able to launch the Sierra Update as describe in post #1
At reboot I noticed that's the sound was not working so I apply the patch audio_cloverALC-120_v1.0b0
Then I put back my config.plist previously backuped
I also put back the Microsoft folder because I have a dual boot....
That's it....
All is back and working as previously.