Slack Hook executed successfully but returned HTTP 500 missing_text_or_fallback_or_attachments
I am getting Hook executed successfully but returned HTTP 500 missing_text_or_fallback_or_attachments
following are configuration we are using for gitlab
GitLab 10.0.2
GitLab Shell 5.9.0
GitLab Workhorse v3.0.0
GitLab API v4
Git 2.13.5
Ruby 2.3.5p376
Rails 4.2.8
postgresql 9.6.3
Please help us to resolve it
Edited by Nikhil Jain