How to Fix Cloudflare 521 Error with Wildcard Subdomains
If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...
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If you see the error fatal: unable to access 'https://...': SSL certificate problem...
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If you see npm ERR! enoent ENOENT: no such file or directory, open '.../package.json...
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