Shadowrun 5th Edition API doesn't Populate Initiative Tracker

I'm having trouble with the Shadowrun 5th Edition API . The "!sr5 --rollInit" command doesn't actually send the tokens to the initiative tracker. Is there a step I need to take first, other than just selecting the tokens to roll for? The rolls show up in the chat with no problems, but the initiative tracker isn't populated. I feel like this should be plug-and-play, but maybe I've missed something? I would appreciate any guidance.

What's the criteria for rolling initiative?  

The documentation for the script suggests that you just need to select the tokens and activate the macro. It should then roll and send the selected tokens to the initiative tracker. It does roll alright, so nothing wrong with the script on that end, but nothing is sent to the tracker. I'm also noticing that the script doesn't seem to recognize the 'astral' or 'matrix' token markers, as the documentation suggests it should.