Welcome @nmarier 
and thank you so much for reaching out!
Sorry for the trouble here. Please have a look at my colleague’s recommendation on this thread: Cannot Delete Team that Has Zero Members - #2 by Marie. I believe this workaround could help you resolve this issue.
Hope this helps, but feel free to comment here if you have any follow-up questions or if there is anything else I can help you with!
Have a great day Nicolas 