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#Troubleshooting — page 2
Articles with this tag
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Claude Code 'There's an Issue With the Selected Model': It's Usually Just a 404
I pointed Claude Code at a fake API and fed it every kind of error. Any 404 — a typo, a stray /v1, a gateway's error page — produced this exact message. Here's how to tell which one you have.
Troubleshooting
AI Engineering
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October 6, 2026
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11 min read
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Claude Code 'Auto Mode Check Unavailable' or 'Classifier Unavailable'? 4 Fixes
Bash, Edit and MCP calls all refused while Read still works. The auto mode safety check failed, not your command. What the error means, why it stops after ten, and four fixes from Anthropic's own docs.
Troubleshooting
AI Engineering
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October 5, 2026
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16 min read
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Next.js 'Failed to Fetch' Google Fonts Behind a Corporate Proxy: I Tested Every Fix
NODE_EXTRA_CA_CERTS fixes it under webpack and does nothing under Turbopack. I ran nine builds through an intercepting proxy on Next.js 16.1 and 16.3 — the fix that works depends on your version.
Troubleshooting
Web Development
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October 2, 2026
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11 min read
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Next.js 16 Turbopack webpack Config Error: Don't Silence It
Next.js 16 fails the build when it finds a webpack config, and the error suggests turbopack: {}. I tested it. The build passes — and the service worker silently disappears.
Troubleshooting
Web Development
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September 25, 2026
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10 min read
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Claude Code on Vertex AI: Why You Get 404s, Wrong Regions and an Opus-Sized Bill
Model not found on Google Cloud's Agent Platform is rarely one problem. A malformed region is silently ignored and falls back to us-east5, ANTHROPIC_VERTEX_PROJECT_ID overrides the project in your credentials, and a deployment with no pinned model is billed at the Opus rate.
Troubleshooting
AI Engineering
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September 10, 2026
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11 min read
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Claude Code SSL Certificate Verification Failed: Fix It by Error Code
API Error: Unable to connect to API: SSL certificate verification failed (UNABLE_TO_GET_ISSUER_CERT_LOCALLY) or Self-signed certificate detected (SELF_SIGNED_CERT_IN_CHAIN) behind Zscaler or any TLS-inspecting proxy. What the code in brackets means in the 2.1.316 wording, why the OS trust store comes before NODE_EXTRA_CA_CERTS, and the certificate fixes from 2.1.310 to 2.1.318.
Troubleshooting
AI Engineering
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September 6, 2026
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27 min read
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Claude Code 529 Overloaded: What It Retries For You, and What It Won't
A 529 isn't your usage limit and doesn't touch your quota. Claude Code already retried ten times before it told you. The useful question is which failures it retries automatically, which it deliberately doesn't, and the one environment variable that stops an unattended run dying on a transient capacity blip.
Troubleshooting
AI Engineering
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August 27, 2026
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8 min read
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Claude Code 'Raw Mode Is Not Supported' on Windows? Match the Error First
Raw mode is not supported, 'claude' is not recognized, 32-bit Windows, Exec format error on WSL1 — five different Windows startup failures that get treated as one problem. Each has a distinct cause and a distinct fix, and four of them aren't install failures at all.
Troubleshooting
AI Engineering
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August 21, 2026
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9 min read
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Why Is Claude Code So Slow, Hanging or Eating Memory? Start With the Silent Failures
High CPU, frozen commands and missing search results usually trace to a handful of specific causes — a compaction loop, a bundled ripgrep that won't run, or WSL quietly returning fewer matches while claude doctor reports everything as OK.
Troubleshooting
AI Engineering
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August 16, 2026
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9 min read
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