So installed the new version 6 for my dr. only to find out that he couldn’t save any global settings. Then viewing this old thread - Error saving globals. I managed to disable mod_security.
A bit of security issue? Anything to change that in future? Not a smash for me to disable it while he updates and re-enable it again afterwards, but I suspect more non technical people will find that to be difficult to email their provider/support to do it the whole time.