WLM 2019 is missing. It was working at Sep 4, 2020 when T262005 was created as it was used as an example for working url.
URL
https://wikiloves.toolforge.org/monuments/2019
Result
This page do not exist in the server. Be sure the address is correct.
If the problem precists contact the developers or create a task in Phabricator.
Expected result
Same as for WLM2020 and WLM2018. Working statistics page
https://wikiloves.toolforge.org/monuments/2018
https://wikiloves.toolforge.org/monuments/2020