If your browser is showing a message that 'This site can't be reached' or ERR_CONNECTION_REFUSED then there's a few things to check in your firewall and web filters.

You might also see a network error message when you try to sign in, like the one below.

1. You'll need to ensure your devices can access *.bookcreator.com and add it to any whitelists.

Please whitelist the following domains: (include the * where specified)

*.firebaseio.com
*.bookcreator.com
*.googleapis.com
googleapis.com
apis.google.com
docs.google.com

2. Book Creator is hosted by Google and they use the same IP addresses for many hosted websites. If your filters are performing a reverse DNS lookup check this may need to be disabled, as the IP addresses for app.bookcreator.com won't reverse back to bookcreator.com.

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