Smoothwall filtering droneblocks app

Has anybody had issues using the droneblocks app in schools that use Smoothwall? The app won’t open properly when we are connected to the school network. Tech support have added the web address to the allowed list of sites but still no joy.

Do you have any idea what urls have been whitelisted. Ideally they could whitelist any content that comes from For example, here is the new Tello Talent coding canvas:

Tello Talent (Robomaster TT) Block Coding

and here is the one for Tello block coding:

Tello Block Coding

Do you have a screen shot of what DroneBlocks looks like on your school network?