Since enabling HTTPS some buttons including the save button here have disappeared. other pages are fine and then some like the plugins page don't load at all now.
Hosting on the latest Apache 2 & Ubuntu Server.
Having looked into it further, when I restart apache, the first time i load the page all the settings are visible, but refreshing it again hides most of them and the dont come back. I have full permissions so not sure why this is happening.
SOLVED: The language file was having issues. removing the GB language sorted it.