Please add the following URLs as entries to the pre-authorization access.
Use the following list if you are using:
spotonwifi.com ssl.gstatic.com accounts.google.com facebook.com fbcdn.net akamaihd.net facebook.net twitter.com twimg.com instagram.com placehold.it placeholdit.imgix.net apis.google.com googleapis.com
Note: Some brands use an asterisk (*) in their Walled Garden. Use the following list if you are using:
*.spotonwifi.com *.facebook.com *.fbcdn.net *.akamaihd.net *.facebook.net accounts.google.com ssl.gstatic.com twitter.com abs.twimg.com *.instagram.com placehold.it placeholdit.imgix.net *.googleapis.com apis.google.com