from my testing:
this was introduced in QUEUES version 15.0.28:, so you should be good there.
my test uses a PUT… you’re good there…
‘contentType’:‘application/x-www-form-urlencoded’
one thing of note - your API is to HTTPS… my test was on HTTP.
http://domain.tld/admin/api/api/rest/queues/update/999
Thats it!
your path is missing the /update/ before the queue ID.