NG webspaces cannot be created. First tasks fail with:
Task name Creating virtual host directory structure for domain service with ID 1595 Last execution output User 'g100496' does not exist.
Pleskd is not properly restarted on Web Servers NG during upgrade. NSS plugin is not loaded into it, system users that are present in configuration database cannot be found.
shstg services :
# service pem restart && service shstg restart
on Web Servers, which are part of cluster.