Cannot upload themes, activate/deactivate plugins.

This is a new one by me, Im admin and have root access, as far as Im aware no changes should have been applied to the site, but I cannot access any update options in the admin area.

How is that possible? Is there a flag I can edit in the database to enable that.
I’ve disabled plugins I thought may effect that, one being User Role Editor.

I can activate and deactivate themes. But there is no option available to upload a new theme.

I believe someone may have changed settings, whjich may be mapped to the database, but trying to track down where that is.

Adding a new Administrator doesn’t resolve the issue.

Is there a flag set by the plugin that would effect this – please note I renamed the plugin to deactivate it. So can’t see what options where visible.