Troubleshooting

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ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091)

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When I install s3cmd package on my FreeBSD system and try to use the s3cmd command I get the following error:
    ERROR: Test failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1091)
How do I fix this problem on FreeBSD Unix system?

Nginx upstream sent too big header while reading response header from upstream

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Nginx upstream sent too big header while reading response header from upstream

I am getting the following error and my app stops working:
    2020/07/12 14:32:03 [error] 45625#45625: *10918 upstream sent too big header while reading response header from upstream, client: 139.xxx.yyy.zzz, server: www.nixcraft.com, request: “POST /app/mg/posts HTTP/2.0”, upstream: “fastcgi://unix:/run/php/php-fpm.sock:”, host: “www.nixcraft.com”, referrer: “https://www.nixcraft.com/mg/admin/index.app”
How do I fix this error for Nginx web server running on Linux or Unix-like systems?