# Cannot open node-red-dashboard after migration from pi3 to pi4: 404 not found

**URL:** <https://discourse.nodered.org/t/cannot-open-node-red-dashboard-after-migration-from-pi3-to-pi4-404-not-found/81316>\
**Category:** Dashboard\
**Tags:** node-red-dashboard, home-assistant\
**Created:** [14 September 2023 15:21 UTC](https://discourse.nodered.org/t/cannot-open-node-red-dashboard-after-migration-from-pi3-to-pi4-404-not-found/81316 "2023-09-14T15:21:11Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![guenter-ms](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/guenter-ms/32/38372_2.png) [@guenter-ms](https://discourse.nodered.org/u/guenter-ms)\
**Post date:** [19 September 2023 08:00 UTC](https://discourse.nodered.org/t/cannot-open-node-red-dashboard-after-migration-from-pi3-to-pi4-404-not-found/81316/21 "2023-09-19T08:00:02Z")

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![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/5/b/5be20c2c9434239f9c8110c9b0bac168e64d2bae.jpeg)

I found a solution!!!

In home assistant press "factory reset" in Settings/addons/Nodered/configuration menu, then restart nodered and --- it works.

Thank you for your wonderful support!!

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**Author:** ![bobcroft](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bobcroft/32/52443_2.png) [@bobcroft](https://discourse.nodered.org/u/bobcroft)\
**Post date:** [25 September 2023 12:18 UTC](https://discourse.nodered.org/t/cannot-open-node-red-dashboard-after-migration-from-pi3-to-pi4-404-not-found/81316/22 "2023-09-25T12:18:15Z")

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That solution may well have worked for you but it definitely isn't a universal fix, I have tried it on three seperate systems and it doesn't work on any of them All are latest version of Hassos. When running node-red under Home Assistant clicking the dashboard button has an address 0f 182.168.1.142:8123. It is using port 8123 not 1880 and that is why it fails. However, I have yet to find out where the port is set in either node-red or home assistant.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 October 2023 12:19 UTC](https://discourse.nodered.org/t/cannot-open-node-red-dashboard-after-migration-from-pi3-to-pi4-404-not-found/81316/23 "2023-10-09T12:19:12Z")

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