This isn't really a bug, but rather an issue with google's password manager.
Many users are seeing a box that has email addresses in it pop up when trying to sign in to Photofy.
If you see this box, please tap on "NONE OF THE ABOVE" and proceed to the sign in form.
Enter your email address and password.
This should sign you into the app.
If you still have troubles getting into your account, please contact support.