Troubleshooting
Everything tagged Troubleshooting.
74 articles
Topic Troubleshooting
Guide
"Your Connection Is Not Private" Behind a Proxy: ERR_CERT_AUTHORITY_INVALID and MITM_DETECTED Explained
A certificate warning on every HTTPS site means something is re-signing your traffic. How to read the certificate, the antivirus and proxy causes, and each fix.
August 24, 2026 · 9 min read
Guide
ERR_CONNECTION_TIMED_OUT: What "Checking the Proxy and the Firewall" Actually Means
Chrome's timeout page tells you to check the proxy and the firewall. We made Chrome wait on seven kinds of silence, over http:// and https://, to see which gives which error, then list the checks in order.
August 24, 2026 · 13 min read
Guide
ERR_TUNNEL_CONNECTION_FAILED: Why the Proxy Refused the Tunnel and How to Fix It
Chrome reached the proxy, asked it for an HTTPS tunnel, and the proxy said no. What Chromium does with that answer, how to read it, and the fix for each cause.
August 24, 2026 · 12 min read
Guide
FlareSolverr Not Working? Every Error Message, What Causes It, and the Fix
Challenge not detected, Timeout after 60.0 seconds, cookies not valid, empty cookies: which program wrote your FlareSolverr error, what it means, and the fix.
August 24, 2026 · 18 min read
Guide
Google "Unusual Traffic From Your Computer Network": What It Means and How to Stop It
Google shows this page when your network looks automated. Both versions of the page word for word, the causes Google lists, and the fixes in order.
August 24, 2026 · 8 min read
Guide
503 Service Unavailable Through a Proxy: Who Sent It, and the Fix for Each
A 503 through a proxy can come from the proxy, a rate limiter, the site's edge or the site. How to tell which, measured with curl, Wget and Python requests.
August 24, 2026 · 10 min read
Guide
Cloudflare Error 522 Connection Timed Out Through a Proxy: What Actually Fixes It
A 522 means Cloudflare could not reach the site's own server in time, so a new proxy rarely helps. Cloudflare's timers, the causes, and what to do.
August 24, 2026 · 13 min read
Guide
How to Turn Off a Proxy on Windows 11, Mac, Chrome, and Your Phone
Where the proxy switch lives on Windows, macOS, Chrome, Edge, Firefox, Android, and iPhone, how to prove it is off, and what it means when it returns.
August 24, 2026 · 14 min read
Guide
Janitor AI Error 429: What the Limit Is, Which Backend Set It, and What Actually Lifts It
A 429 on Janitor AI is a rate limit set by the backend behind your proxy: OpenRouter's 20 a minute and 50 a day, Gemini's per-project caps, DeepSeek's per-account concurrency. What each one means, the fixes that work, and the three that never do: a second account, a second key, and a different IP.
August 24, 2026 · 7 min read
Guide
Janitor AI Network Error and 401 Unauthorized: The Two Errors That Happen Before the Model Answers
A network error on Janitor AI means the request never reached a model; a 401 means it reached one that rejected the key. Janitor's own guide traces most network errors to a wrong URL or an unrefreshed page. The exact URLs for OpenRouter, DeepSeek, Gemini, Claude and Mistral to compare character by character, a two-line curl test, the key mistakes behind 401, and the one network-error case that is about your network.
August 24, 2026 · 6 min read
Guide
Janitor AI 'No Endpoints Found': The Three OpenRouter Settings Behind It, and the Fix for Each
'No endpoints found' on Janitor AI is OpenRouter saying nobody is serving the model you chose, or that your own settings forbid the providers that would. Janitor's error guide lists three causes: provider restrictions, a retired model id, and a privacy setting. Here is each one, the fix, and the current list of free ids.
August 24, 2026 · 5 min read
Guide
net::ERR_PROXY_CONNECTION_FAILED in Puppeteer, Playwright, and Selenium: Causes and Fixes
Which proxy mistake gives which net:: error in headless Chrome. Measured in ten cases: dead addresses, passwords, credentials in the URL, schemes Chrome rejects, refused tunnels. SOCKS5 logins, Docker and CI from the Chromium source and the docs.
August 24, 2026 · 7 min read
Guide
A "Proxy Authentication Required" Popup Keeps Appearing: Where It Comes From and How to Stop It
A proxy sign-in box in Chrome, Firefox, Windows, VS Code or IntelliJ that keeps coming back. Why it returns, measured in Chrome, whose proxy it is, and how to stop it safely.
August 24, 2026 · 10 min read
Guide
"Proxy Error: The Proxy Server Received an Invalid Response From an Upstream Server" (Apache 502)
Apache's mod_proxy reporting that the server behind it did not answer properly. What each Reason line means, why your own proxy settings are irrelevant, and the admin fixes.
August 24, 2026 · 9 min read
Guide
The Proxy Server Isn't Responding: Fixes for Windows, Edge and Firefox
Internet Explorer's message for a proxy that does not answer, and what Edge and Firefox show for it. What to check in order, who set the proxy, and the fixes.
August 24, 2026 · 12 min read
Guide
Proxy Server on PS5, PS4, and Switch: Use or Do Not Use, and What It Cannot Fix
PS5 and PS4 offer a proxy server in their advanced setup. Sony's advice for home users, what the setting cannot fix (NAT type, lag, region), and Xbox.
August 24, 2026 · 11 min read
Guide
Proxy Settings Keep Turning Back On? Find What Is Writing Them
Something keeps rewriting your proxy setting: a leftover VPN, a policy or profile, or malware. How to identify the writer on Windows and Mac and remove it for good.
August 24, 2026 · 10 min read
Guide
Reddit "You've Been Blocked by Network Security": Why It Happens and How to Fix It
Reddit's network security block, explained from Reddit's own pages and the reports: the two messages, the February 2026 incident, what the block looks at, the fixes in order, and the route Reddit gives programs.
August 24, 2026 · 7 min read
Guide
Scrapy TunnelError: "Could Not Open CONNECT Tunnel With Proxy" (407, 403, 502) Explained
Scrapy's TunnelError means the proxy answered the CONNECT request with a status other than 200. What each status means, the Proxy-Authorization trap, and the fix.
August 24, 2026 · 6 min read
Guide
YouTube "Sign in to Confirm You're Not a Bot": Fixes in the Browser and in yt-dlp
Why YouTube asks you to confirm you are not a bot, what yt-dlp adds to the message, and the checks that fix it, in the order 51 bug reports rank them.
August 24, 2026 · 10 min read
Guide
SOCKS5 Proxy Errors Explained: General SOCKS Server Failure, Not Allowed by Ruleset, Host Unreachable
SOCKS5 replies are numbered by the protocol, so each error names its cause. What the reply codes and authentication failures mean, and the fix for each.
August 24, 2026 · 15 min read
Guide
"Sorry, You Have Been Blocked" (Cloudflare): Why You See It and What Fixes It
Cloudflare's block page means a rule on the site refused your request: your address, your network, or what you sent. Every line explained, from Cloudflare's documentation and 476 reports.
August 24, 2026 · 13 min read
Guide
Spotify Error Code 4 and "A Firewall May Be Blocking Spotify": What Each Means, and the Proxy Settings Fix
Error code 4 means Spotify's desktop app thinks it is offline. The firewall message is a sign-in error with other codes. What each means, and the fixes in order.
August 24, 2026 · 15 min read
Guide
There Is Something Wrong With the Proxy Server: How to Fix It
Chrome and Edge show this when Windows points them at a proxy they cannot reach: nothing listens at its address, or its name does not exist. We tested seven broken proxy setups to show which cause it, and how to fix each.
August 24, 2026 · 10 min read
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