Why might Cloudflare's SSL certificate not be trusted by my browser?

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Grade: Education Subject: Support
Why might Cloudflare's SSL certificate not be trusted by my browser?
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Browser trust issues usually arise when Cloudflare's root certificate isn't properly installed or outdated on your system. You can usually resolve this by updating your operating system or browser. Occasionally, browser extensions or security software can interfere with certificate validation. Temporarily disabling these can help diagnose the problem.