After trying to upgrade Plesk Small Business Panel 10.2.0, I got some errors and was unable to load my plesk admin control panel on port 8443. Just a White Screen…
I found this on parallels forum:
autoinstaller --select-release-latest --upgrade-installed-components --ignore-key-errors
when running, looked very similar to the bootstrapper.sh fix… and guess what? running this completely takes down your server, which seems to be common for me lately with the plesk 10.x CRAP.
The surprise, this FIXES the white page control panel!