VictoriaLogs' -http.pathPrefix applies to every endpoint, not just the UI, so the elasticsearch bulk path is /logs/insert/elasticsearch/. It rejected the writes with exactly that message. The other three references (vmalert datasource, the metrics scrape, the deadman health probe) were already prefixed correctly. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>