Hi,
iǘe got the same problem here.
I created a FB-App but facebook will not accept the given URL.
It? a sub-domain which is located at uphero.com
i try to enter domainname.uphero.com/ in FB and https://domainname.uphero.com but both versions are NOT saved at the FB-App.
The page leaves white where the summary must be.
And therefore i will get the 191 auth error when i try to authorize.
Any ideas?