Mac OS doesn't update

Hello,

I tried several times to update from macOS 10.13.3 to macOS 10.13.5 via Mac App Store.

After 'updating' and rebooting, my mac doesn't show any error messages but my version is still macOS 10.13.3.

I checked the install.log file located in /private/var/log/ and I found multiple times the following message :

https://pastebin.com/e0dQYLZ7

I didn't find a single topic or website treating this issue.

Thanks for enlightening me.

Nicolas