Error: net::ERR_BLOCKED_BY_ADMINISTRATOR

[mzac]

What happened:
When trying to use the new grafana-image-renderer plugin I get the following error:

logger=plugin.grafana-image-renderer t=2022-04-05T11:38:22.25-0400 lvl=eror msg="Error while trying to prepare page for screenshot" 
 url="http://localhost:3000/d-solo/0AtjC6s7z/test-alerts?orgId=1&panelId=2&render=1"
 err="Error: net::ERR_BLOCKED_BY_ADMINISTRATOR 
 at http://localhost:3000/d-solo/0AtjC6s7z/test-alerts?orgId=1&panelId=2&render=1\n    
 at navigate (/snapshot/grafana-image-renderer/node_modules/puppeteer/lib/cjs/puppeteer/common/FrameManager.js:156:23)\n    
 at processTicksAndRejections (internal/process/task_queues.js:95:5)\n    
 at async FrameManager.navigateFrame (/snapshot/grafana-image-renderer/node_modules/puppeteer/lib/cjs/puppeteer/common/FrameManager.js:131:21)\n    
 at async Frame.goto (/snapshot/grafana-image-renderer/node_modules/puppeteer/lib/cjs/puppeteer/common/FrameManager.js:512:16)\n    
 at async Page.goto (/snapshot/grafana-image-renderer/node_modules/puppeteer/lib/cjs/puppeteer/common/Page.js:1167:16)\n   
 at async Browser.takeScreenshot (/snapshot/grafana-image-renderer/build/browser/browser.js:256:13)\n    
 at async Browser.render (/snapshot/grafana-image-renderer/build/browser/browser.js:230:20)\n   
 at async PluginGRPCServer.render (/snapshot/grafana-image-renderer/build/plugin/v2/grpc_plugin.js:95:13)"

What you expected to happen:
It should work

How to reproduce it (as minimally and precisely as possible):
All my alerts give this error

Anything else we need to know?:
It was working in the past, not sure what changed.

Environment:

• Grafana Image Renderer version: 3.4.2
• Grafana version: 8.4.3
• Installed plugin or remote renderer service: plugin
• OS Grafana Image Renderer is installed on: Red Hat Enterprise Linux Server release 7.9 (Maipo)
• User OS & Browser: n/a
• Others: n/a

[AgnesToulet]

Hello! ERR_BLOCKED_BY_ADMINISTRATOR is an error thrown by Chromium when attempting to access the Grafana dashboard. It seems like some policies on the server hosting the image renderer are blocking it to access Grafana or even any internet access. Can you check your network / Chromium policies on this server?

[AgnesToulet]

Closing this issue as it's been a few months without any more information. Please reach out if you are still experience this issue with latest versions of Grafana and the image renderer.