Have we lost the Circuitlab circuit editor feature? I started asking a question this morning, and the button appears to be missing from the editor. Maybe it is down for maintenance or such?
Fixed now, thanks for the report!
This was a bug I created over 10 years ago. Under specific timing conditions, it was possible for dependencies like the CircuitLab plugin to never start. Those timing conditions apparently never happened until recently (it can come down to something as simple as two files loading in different order), which is why it was never noticed before.