slack-term: First time setup, unable to load: "Slack rate limit exceeded, retry after 3s"

I just installed slack-term for the first time on my system using a legacy token. However, upon launching it sits at the LOADING screen for 3-4 second, then drops back to the shell with:

2018/11/09 16:31:49 Slack rate limit exceeded, retry after 2s

My hunch is that the first-time setup is exhausting the API rate limit? But I’m not sure if it’s ever going to actually finish:

craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:31:57 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:32:01 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:32:05 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:32:21 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:32:46 Slack rate limit exceeded, retry after 2s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:34:05 Slack rate limit exceeded, retry after 2s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:43:00 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:48:44 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:49:46 Slack rate limit exceeded, retry after 3s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:50:56 Slack rate limit exceeded, retry after 2s
craig@Craigs-MBP-2:~$ slack-term
2018/11/09 16:52:23 Slack rate limit exceeded, retry after 1s

Is this a known issue? Something on my end? Is it stuck in a loop somewhere? I can try to Wireshark this if necessary but was hoping for an easier fix.