Maintenance Page Blank
Did see the same blank page error here:
They uninstalled the "Maintenance Mode add-on" and the use the default one
The Maintenance Editor add-on should not be used with the default concrete5 maintenance mode. I wonder if that is what is giving you trouble. If you still are having issues after disabling the default concrete5 maintenance mode open a support ticket and we'll see if we can track it down.
then Permissions & Access -> Maintenance Mode.....enabled this feature...you are done
please uninstall the add-on you have already installed for maintenance mode....because there is inbuilt features of "maintenance mode" in concrete 5
don't hesitate to ask any problem...thanks
I have Disabled the default System & Settings > Maintenance Mode, and Enable the Maintenance editor. If I log-out I get a Blank concrete bar at the top and no errors show on the console log!(see attached) If I re-Enable the System & Settings > Maintenance Mode the maintenance_mode.php page displays correctly.
So I was able to get PHP Storm setup and run XDebuger. Here is a screen shot of the error that shows up. This is happing with a clean version of concrete5 and Installing Maintenance Editor. So here is the other catch, this is only happing on the 'Green Salad Theme' that comes with Concrete5 and my custom theme. It does not happen on the other themes. I will start to disable things on my theme and see if I find what's causing this issue. On the other hand, I hope this info helps a bit more then just a 'blank screen'!.
So let just start by saying 'Its always the simplest thing that we over look at'. The problem was I had a 'home.php' in my theme, and so does the Green Salad theme that comes with Concrete5. Once I renamed it to something else (such as 'landingpage.php') and cleared the cache with-in concrete5 it worked just fine.
Rename 'home.php' to 'landingpage.php' (or anything else you wish!)