Open the email on the device where Wifibooth is installed
Oops! You’re probably trying to sign-in to the Wifibooth Service by opening a link in the email you received. BUT, you need to open this email link on the iPad or iPhone where Wifibooth is installed. For more information please see How to send texts (SMS/MMS) with Wifibooth
If you are still seeing this page display after opening the link, then please force-quit Wifibooth on this device and start Wifibooth again.