Vantage 1.3 redirects to firstrun page, cannot access other admin pages
I've updated Vantage 1.3 using AppThemes updater plugin.
In the Admin, I can't access any page, I can't save anything.
The Admin is locked in this page: /wp
Even when I click "Save Changes" or try another page, I went back to this page.
My installation is MultiSite and I am using a Child Theme "Vantage Child Theme".
When I activate the main theme "Vantage", the problem not occurs.
Is there any incompatibility between Vantage 1.3 and Child Themes?