Hey, Due to an API change in Wikibase which happened several weeks ago, one of ORES dependencies (pywikibase) broke and caused ORES to break in small proportion of Wikidata edits but it got bigger and bigger until today which which we had an unscheduled deployment of ORES. Everything is okay now but we might lose some scores on edits in ORES review tool, I run a maintenance script to fill them now.
More details can be found in https://phabricator.wikimedia.org/T154168
Happy holidays, Prost!