Build triggers missing & unable to re-create

I’ve had an external build trigger.

The URL was

It now reports 301 Moved Permanently.

Fair enough, since everything moved to I don’t see why you didn’t migrate the triggers, but you’ll have your reasons.

Nevertheless, I would now like to set up that build trigger again. But this does not seem possible unfortunately. Every time I enter a name for the trigger on the Build Configurations page and then click the + button, the text is cleared and nothing happens. I’ve tested on Firefox and on Safari. Please fix this.