> For the complete documentation index, see [llms.txt](https://docs.datasentinel.io/manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datasentinel.io/manual/implementation/troubleshooting.md).

# Troubleshooting

- [Platform Diagnostics Tools](https://docs.datasentinel.io/manual/implementation/troubleshooting/platform-diagnostics-tools.md): Starting with version 2025.11, two new diagnostic scripts are available to help identify issues and assist the support team.
- [Unexpected Agent Termination](https://docs.datasentinel.io/manual/implementation/troubleshooting/unexpected-agent-termination.md): In some cases, the Agent may stop running without any visible error or warning.
- [Error message: “502 Bad Gateway”](https://docs.datasentinel.io/manual/implementation/troubleshooting/error-message-502-bad-gateway.md)
- [The UI is not displaying any metrics for my new instance.](https://docs.datasentinel.io/manual/implementation/troubleshooting/the-ui-is-not-displaying-any-metrics-for-my-new-instance..md)
- [UI dashboard is encountering loading errors](https://docs.datasentinel.io/manual/implementation/troubleshooting/ui-dashboard-is-encountering-loading-errors.md)
- [InfluxDB](https://docs.datasentinel.io/manual/implementation/troubleshooting/influxdb.md): InfluxDB is an open-source time series database used by Datasentinel to store collected metrics and manage data retention.
- [SELinux](https://docs.datasentinel.io/manual/implementation/troubleshooting/selinux.md): Security-Enhanced Linux (SELinux) is a Linux kernel security module that provides a mechanism for supporting access control security policies, including mandatory access controls (MAC).
- [NGINX](https://docs.datasentinel.io/manual/implementation/troubleshooting/nginx.md): NGINX sits at the edge of a Datasentinel deployment and acts as a reverse proxy. All inbound HTTPS traffic terminates at NGINX before being forwarded to the internal Datasentinel services.


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