### Plone Documentation versions affected - [ ] 5.x - [X] 6.x ### Description Migrate the [Error Reference](https://docs.plone.org/appendices/error-reference.html) from https://github.com/plone/documentation/blob/5.2-myst/5.2-myst/appendices/error-reference.md. Update the link in `backend/upgrading/troubleshooting.md`.
Plone Documentation versions affected
Description
Migrate the Error Reference from https://github.com/plone/documentation/blob/5.2-myst/5.2-myst/appendices/error-reference.md.
Update the link in
backend/upgrading/troubleshooting.md.