- Some functionalities are absent in Plesk interface (Extensions button in the left panel, Subscriptions menu, PHP Settings for a domain, links in Tools & Settings, etc.);
- Change View option to change interface view from Power User to Service Provider is missing in the left bottom corner;
Plesk administrator interface management is locked by enabled Restricted Mode (on Plesk Obsidian) / Custom View (on Plesk Onyx) in Tools & Settings > Restricted Mode Settings/Custom View Settings.
Log in to Plesk go to Tools & Settings > Restricted Mode Settings and untick Enable Restricted Mode: