Administration Impossible after upgrading to 7.57

by Jacques-Marie Moranne   Last Updated February 28, 2018 11:07 AM

After upgrading to 7.57, the Admin menu is displayed, but I can't access any admin page :

All the menu items display a page which tells me that the site is in maintenance mode (which is normal since I did it before upgrading), but I can't get out of it, since even the Configuration menu item displays this page and not the normal Configuration page.

On an other hand, the site seems to work correctly (in maintenance mode), but I can't modify any page.

Any help is welcome.

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