NGINX popups are blank and AJAX requests return 404 after osTicket upgrade.
NGINX requires manual configuration of rewrite/location rules to support osTicket's PATH_INFO-based URLs. Without correct rules, AJAX endpoints return 404 and popups are blank. Either configure NGINX correctly using the archived recipe (https://web.archive.org/web/20240511013836/https://www.nginx.com/resources/wiki/start/topics/recipes/osticket/) or switch to a natively supported web server (Apache, LiteSpeed, IIS).
Originally sourced from forum.osticket.com . osFAQ.org summarises community knowledge for quick reference.
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