> For the complete documentation index, see [llms.txt](https://wiki.codeandcompile.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.codeandcompile.com/iiot/iiot-tools/opc-ua/troubleshooting.md).

# Troubleshooting

{% content-ref url="/pages/AvggzdEOBT8aHLKCPJDE" %}
[Certificate error in Node-RED](/iiot/iiot-tools/opc-ua/troubleshooting/certificate-error-in-node-red.md)
{% endcontent-ref %}