As an experienced developer, I understand the urgency of resolving Apache server errors to ensure smooth website operation. Based on the details provided, I would recommend the following approach:
1. Investigate the root cause of the PHP script not returning valid HTTP headers before completing execution. This could involve reviewing the script, ensuring proper output handling, and checking for any PHP errors or misconfigurations.
2. Address the pm.max_children setting error by adjusting the configuration in the PHP-FPM pool configuration file to increase the maximum number of child processes allowed. This can help prevent the server from reaching its limit and causing errors.
3. Conduct a thorough review of the Apache configuration files, particularly the .htaccess file and virtual host configurations, to check for any syntax errors, permissions issues, or conflicting settings that might be causing the Internal Server Error.
4. Implement best practices for error handling and logging to proactively identify and address any future server errors promptly.
To proceed effectively, additional information such as the server environment, PHP version, and any recent changes made to the server would be beneficial. Do you have access to the server configuration files, and are you open to making necessary adjustments to resolve the issues promptly?... Come over chat