I tried to generate the certificate using codename one certificate wizard but was stopped at "select team". I don't have any option and the next button is not taking me anywhere. When I hit the back button, it takes me back to sign in page. Please, how do I solve this?
Must I become a paid developer member of apple before I can develop iOS app?
Yes, you have to create an Apple Developer Account.
Certificates are created in the Apple Member Center which is a managing center for the developer account.