Something is broken
A page that will not load, a link that goes nowhere, a map with no pins. Not a record you think is wrong — that has its own form, because those go in a log we have to keep.
There is no form here on purpose: the three things we need are the URL you were on, what you expected, and what happened instead, and an email carries all three better than a text box with a character limit.
The URL matters most. “The site is broken” and a link we can open are hours apart.
Already known
Coverage grows a neighbourhood at a time, so an address with no card is usually not a bug — it is a building we have not built yet, and the page says so. A fact that looks stale is often the city's own record; every fact shows the date we last checked it.