I am new at the forum (and with Omero).
I upgraded a Omero setup from version 5.5 to 5.7.1, initially all seems to work but some options in the Omero web interface are grayed out. For example, in the "Explore¨ tab the “Create new project”, “Create new dataset” and “Create new screen” options are not available. Also in the “Users” tab the “Add new user” button is not present, the “Change user password” and “Save” buttons do not work.
The system is installed on a Ubuntu 18.04 VM.