If you are presented with a blank screen or message stating there was a "connection error," you may need to configure your firewall to allow specific websites.
Here is a list of requirements for CS First.
- https://csfirst.withgoogle.com
- https://csfirstcoding.withgoogle.com
- https://storage.googleapis.com
- https://fonts.googleapis.com
- https://ajax.googleapis.com
- https://fonts.gstatic.com
- https://www.gstatic.com
- https://www.google.com
- https://ssl.gstatic.com
- https://support.google.com
- https://classroom.google.com
- https://accounts.google.com
- https://apis.google.com
- https://lh3.googleusercontent.com
- https://www.google-analytics.com
- https://www.googletagmanager.com