Nginx 1 FastCGI sent in stderr: Primary script unknown (12 Solutions!!)
nginx: FastCGI sent in stderr: Primary script unknown
nginx FastCGI sent in stderr: Primary script unknown
DevOps & SysAdmins: Nginx rewrite rules, fastcgi and WordPress - 404 pages due to REQUEST_URI
nginx php5-fpm File not found -- FastCGI sent in stderr: Primary script unknown
nginx 12 FastCGI sent in stderr Primary script unknown
PHP : How to debug FastCGI sent in stderr: Primary script unknown while reading response header fro
DevOps & SysAdmins: PHP-FPM Primary script unknown, but SCRIPT_FILENAME is set correctly
Error 200#0: \*79 FastCGI sent in stderr: Primary script unknown while reading response header...
NGINX: Primary script unknown - when calling a dynamic URL with controller prefix
FastCGI sent in stderr: Primary script unknown while reading response header from upstream
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Last Updated: August 22, 2026
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