I cannot add groups to project roles

[Frederik Schaaf]

When I try via UI, all documentation I find tells me it should be possible, however the UI only suggests email addresses to me. When I forcibly enter a group name, it still doesn't work.

I also tried via REST API, but it just tells me my project key is not found.

I can do GET requests via browser like so:
https://xxx.atlassian.net/rest/api/2/project/xxx/role

and that works, but in order to post I need curl, which I tried like this:

curl -X POST "https://xxx.atlassian.net/rest/api/3/project/xxx/role/10010" \
-H "Content-Type: application/json" \
-d '{
"group": ["jira-admins"]
}'

but I get:

"project key 'xxx' is not found"

[Frederik Schaaf · Accepted solution]

I found out that this is due to the fact I was not in the "jira-admins" groups, which has the "browser users and groups" permission.

[John Funk]

Hi Frederik,

A little more specifically, you must be in a group to be able to select the group. So, sometimes you need to add your self to the group, add the group to the role or to the scheme, and then take yourself back out of the group. 

But you must have User Access permissions to be able to modify groups.