I'm getting this on itwiki when I visit the recent changes with ScoredRevisions enabled:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://ores.wmflabs.org/scores/itwiki/?models=reverted&revids=76746562%7C76746557%7C76746552%7C76746549%7C76746544%7C76746543%7C76746538%7C76746537%7C76746536%7C76746531%7C76746530%7C76746529%7C76746528%7C76746524%7C76746519%7C76746518%7C76746515%7C76746514%7C76746512%7C76746510%7C76746507%7C76746501%7C76746499%7C76746495%7C76746491%7C76746490%7C76746485%7C76746483%7C76746482%7C76746481%7C76746480%7C76746477%7C76746470%7C76746469%7C76746466%7C76746462%7C76746458%7C76746456%7C76746455%7C76746448%7C76746444%7C76746429%7C76746428%7C76746427%7C76746418%7C76746408%7C76746406%7C76746404%7C76746389. (Reason: CORS header 'Access-Control-Allow-Origin' missing).
Accessing the link directly in the browser shows this response:
{ "error": { "code": "server overloaded", "message": "Cannot process your request because the server is overloaded. Try again in a few minutes." } }