this error is usually related to the first request the browser sends, as the browser doesn't "know" yet, that authorization is required. Monit sends a "401" response and browser then repeats the request with Basic authentication (some browsers send multiple requests in parallel, for example for favicon, so Monit may log two such errors at once). See for example https://en.wikipedia.org/wiki/Basic_access_authentication
if you are interested in how Basic authentication works.
We have lowered the priority of this message from "error" to "debug" in Monit 5.23.0, so it won't flood logs unless you enable the debug mode.
error : HttpRequest: access denied -- client 127.0.0.1: missing or invalid Authorization header
I keep seeing this on my log, anyone have idea why?
Director of Infrastructure
Tetrion Capital Limited
Address: Suite 2716, Two IFC, Central, Hong Kong