How to debug a 500 Internal Server Error in Strapi

A Strapi 500 Internal Server Error is a generic production response that intentionally hides exception details from API clients, making the server log the primary source for diagnosis. Effective troubleshooting involves watching Strapi logs while reproducing the failed request, increasing log verbosity or temporary SQL debugging when needed, distinguishing Strapi JSON errors from proxy-generated failures, and using curl to isolate frontend-related issues. Common causes include unhandled errors in custom controllers, services, middleware, or lifecycle hooks; dropped or exhausted database connections; invalid email or upload provider configuration; broken content-type relationships or components; malformed requests lacking expected JSON headers or bodies; and missing security-related environment variables. Investigation should determine whether the failure affects specific data, roles, parameters, or deployments, while long-term reliability can be improved through centralized searchable logs, error-tracking tools, and health monitoring.

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