I've seen this in various other discussions but none that have seemed to address my issue. I updated an older concrete5 site at work from 5.5.2.1 to the latest. via the Update tool in the CMS itself. So I went from 5.5.2.1 to 5.6.3.1 and everything seems to work just fine other than the fact that when I'm logged in as an admin, I can see the dasbhoard bar but no buttons on it. It looks like a script error inside /tools/page_controls_menu.php on line 55 with this method : getPendingAction()

The error is this:
Fatal error: Call to undefined method Page::getPendingAction() in /var/www/vhosts/a-millartistlofts.com/subdomains/dev/tools/page_controls_menu_js.php on line 55


so the whole js file comes out as this:

var menuHTML = '';


Fatal error: Call to undefined method Page::getPendingAction() in /var/www/vhosts/a-millartistlofts.com/subdomains/dev/tools/page_controls_menu_js.php on line 55

I'm not sure why that method is coming up undefined as it seems to lead somewhere when I check for its definition.

Any Ideas would be awesome.
Thanks,
Kobby