https://www.theregister.co.uk/2018/07/27/slack_swallows_hipchat_stride/

Oz enterprise software biz Atlassian is discontinuing its chat apps Stride and Hipchat – and handing the tech blueprints over to Slack.

If you're using those two Atlassian messaging platform then you'll need to migrate away to some other service as the plug is being pulled.