Cannot invite colleague to my Org in 14 day free trial

I started my 14 day free trial, selecting AWS then us-east-1. Everything seemed to work fine until I wanted to invite my colleague to my Org. As he followed invitation link, he got stuck at a step where he had to select Cloud provider and region again (the dropdown lists did not work for him). I thought he did not have to do this step since I was inviting him to my Org
I tried inviting him as both Owner and Admin roles, still didn't work
Any advice is highly appreciated.

Hi @Ryan_Le , welcome to our community.

Are you following this practices? Invite members to your organization | Elasticsearch Service Documentation | Elastic

Hi Alex,

Thanks for the response and the link. The key point in the link as I see it, is that "one account belongs to only one org", which should have been fine in our case since we use a brand new account.

Anyway we found a workaround, not very straightforward but it works for us now. This topic could be closed.

Thanks