A security issue has been reported with a Varnish cache server, resulting in access denials. The problem appears to be caused by an error code of 54113 and is related to the “cache-ewr-kewr1740065-EWR” identifier. This specific cache server has experienced errors, and attempts to access it are being blocked due to authentication issues.
Source: https://www.mlb.com/news/ceddanne-rafaela-s-big-night-helps-red-sox-beat-giants