Cannot set Heroku Deploy user

heroku
ssh

#1

When I click on the settings gear icon on my build, then scroll down to heroku deployment, and click the blue "set user to " button, nothing happens. Expanding devtools, shows that the request returns a 403 (unauthorized).

Failed to load resource: the server responded with a status of 403 (Forbidden)
/api/v1.1/project/github/myTeam/myProject/heroku-deploy-user

Deployment with the same user does work from my machine. Any help would be appreciated!


#2