### Problem to solve When a user has an invalid or absent file (`serverless.yml` or `.gitlab-ci.yml`), we currently do not provide enough detail for the cause and the solution of the problem (only a general dialog with possible causes) https://gitlab.com/gitlab-org/gitlab-ce/uploads/b3ebd4cd20a49ccc615475919278bd84/Screen_Shot_2018-12-26_at_1.44.17_PM.png ### Target audience Developers, operators ### Further details <!--- Include use cases, benefits, and/or goals (contributes to our vision?) --> ### Proposal 1. If a file is absent, simply note its absence in the dialog, nothing else. 1. If a file format is incorrect, note which file and provide a link to docs that state the correct form for the file. ### What does success look like, and how can we measure that? <!--- If no way to measure success, link to an issue that will implement a way to measure this --> ### Links / references