Fill this in, then either open a prefilled GitHub issue or copy the text into Discord.
Security problems do not go here. If you have found something that affects other people's machines, use the private channel in SECURITY.md rather than a public issue.
The issue opens with everything above already filled in, under the same headings as the repository's playtest-report template. Attach the session zip in that window — a browser cannot attach a file to an issue for you.