Hello all!
You might have experimented some issues with maps.wikimedia.org [1] or the various wiki pages that include mapframe [2] / maplink [3].
Short story: we are working on upgrading the maps servers from Debian Jessie to Debian Stretch and we encountered some issues with Cassandra.
If you want more details, have a look at the incident report [4].
As always, sorry for the inconvenience.
Have fun!
Guillaume
[1] https://maps.wikimedia.org/ [2] https://www.mediawiki.org/wiki/Help:Extension:Kartographer#%3Cmapframe%3E_us... [3] https://www.mediawiki.org/wiki/Help:Extension:Kartographer#%3Cmaplink%3E [4] https://wikitech.wikimedia.org/wiki/Incident_documentation/20190122-maps