Are you new to SchoolFox?
Please re-check the the invitation code and note that the invitation code only consists of numbers and lower case letters.
Are you already registered with the invitation code?
You only need the invitation code once for the registration to be connected to the class. As soon as you have set up your SchoolFox account, all you need for the login is your e-mail address and your chosen password.
If the code still doesn´t work, please contact the admin of your school. The admin can print out the correct code again.