I’m at this step in the instructions:
In order for your Particle SIM card to connect to the cellular network, it needs to be activated. The only way to do this is to go through SIM activation and setup at https://setup.particle.io. Follow the on-screen prompts to complete device setup and SIM activation.
I follow the prompts at setup.particle.io and enter my ICCID number, but the web page instead of completing the transaction just spins a Particle logo at the bottom.
Suggestions? When I plug the SIM into the Electron it blinks green, which I take to mean as “trying but not succeeding”.