Resolve Recurring Errors in osTicket Platform

Critical Error Resolution (Database, CSRF, Mailer, Email Loops) in osTicket v1.18.2 **Project Description:** We require an expert osTicket programmer and server administrator to diagnose and resolve a series of recurring errors affecting the stability, communication flow, and database access of our support platform at https://ayuda.gradeco.com.co/ The platform is hosted on Hostinger. Server and application credentials will be provided exclusively to the freelancer once the project is awarded. **Current Technical Environment:** * **osTicket Version:** v1.18.2 * **MySQL Version:** 11.8.9 * **PHP Version:** 8.1.34 * **Infrastructure:** Hosted on Hostinger (srv1205.main-hosting.eu)[cite: 3] under the subdomain ayuda.gradeco.com.co. * **Configuration Alerts:** The system indicates the missing PHP extension `APCu` and suggests reviewing the `cgi.fix_pathinfo` parameter. **Registered Errors to Resolve:** 1. **osTicket Fatal Error (Database):** Receiving system alerts indicating "Database error — Operation not permitted". Execution permissions and blocked queries need to be reviewed. 2. **Invalid CSRF Token __CSRFToken__:** Constant generation of system log warnings originating from multiple IP addresses. 3. **Email Loop Detected:** Critical errors associated with receiving automated emails that are generating infinite response cycles. 4. **Mailer Error:** Recorded failures in the email sending engine, preventing the proper dispatch of notifications. **Candidate Requirements:** * Advanced and demonstrable experience in osTicket core (specifically versions 1.17+ and 1.18+). * Proficiency in PHP 8.x configurations, session management, security (CSRF), and MySQL database administration. * Experience diagnosing email protocols (IMAP/POP3, SMTP, OAuth2) and preventing auto-responders/loops. * Ability to operate under corporate standards, delivering definitive solutions with agile response times. **Expected Deliverables:** 1. Correction of the fatal database error ("Operation not permitted") and stabilization of connections. 2. Audit and correction of PHP parameters (`APCu` and `cgi.fix_pathinfo`). 3. Root-cause resolution to prevent CSRF Token invalidation. 4. Reconfiguration of incoming/outgoing emails to eliminate loops and ensure Mailer functionality. 5. Brief executive technical report detailing the root causes of the detected problems and the exact adjustments applied to the code or server.