I went through setting up this plugin in Mattermost 8.1 and Jira Cloud. Have identified several differences from the instructions provided in the README:
running /jira setup (at the end of step 1) covers all the required steps, there's no need to install the plugin (step 2) and configure webhooks (step 3) separately
/jira instance install cloud <url> doesn't seem to work anymore, the new method via OAuth 2.0 app is needed
the setup wizard provides all the instructions to set up the OAuth 2.0 app in developer.atlassian.com/console, but is missing one important bit: enable sharing with other users. Without this other users are not able to connect with /jira connect.
To enable sharing for the OAuth 2.0 app, one needs to go to the Distribution tab on the app page, and enable sharing.
I went through setting up this plugin in Mattermost 8.1 and Jira Cloud. Have identified several differences from the instructions provided in the README:
/jira setup(at the end of step 1) covers all the required steps, there's no need to install the plugin (step 2) and configure webhooks (step 3) separately/jira instance install cloud <url>doesn't seem to work anymore, the new method via OAuth 2.0 app is needed/jira connect.To enable sharing for the OAuth 2.0 app, one needs to go to the Distribution tab on the app page, and enable sharing.