Last tested: Mar 27, 2020
For this error type, the RendererAuthenticationHTTPException error will appear in the schedule history or the PDF/PNG download page and LOGIN_HTTP_ERROR will appear in the logs.
When rendering with Chromium, Chromium will first check that the Looker instance is available by navigating to /alive. Then, it will login as the Looker user rendering the content with a one-time login token at /login/ephemeral and then load the dashboard or look to be rendered.
This error means that when logging in as the Looker user at /login/ephemeral the page did not redirect to a page with a 200 response. In other words, something went wrong when trying to log the user in.
A couple things to check:
This content is subject to limited support.