Slack Jenkins plugin not working
Was dealing with the same issue. So I've found simple workaround (for integration with slack.com. Didn't check for other systems):
- You need to specify direct URL for notifications in Jenkins for your slack systemBase URL - https://your-sub-domain.slack.com/services/hooks/jenkins-ci/
- Populate other required fields (Team Subdomain, Integration Token, Chanel)
- Click Test Connection button
After following this steps you may solve the issue