I get a white screen when opening the editors.
editors stuck on 'Wait a Moment' screen.
Is there something i need to add or a security setting that needs to be enabled or a page that needs unblocking.
Do I need any special configuration on my school firewall?
What domains need to be unblocked to allow the micro:bit editors to work?
The simulator is missing when I load the editor
Each editor has different requirements. Here is a full list of domains that you would have to whitelist on any firewall configuration.