I don't know why, but my previous post was deleted from other thread...
In another installation i've found this error when upgrade:
[ERROR]
autoinstaller::Functions::_installFiles: rsync: failed to set times on "/var/www/virtual": Operation not permitted (1)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1183) [sender=3.1.0]
autoinstaller::Functions::install: An error occured while performing installation steps
iMSCP::Debug::END: Exit code: 23
I've see that during installation the folders gui and engine change owner to root and show this error
Thanks