# Node-RED upgrade and uibuilder update: flows stopped due to missing node types

**URL:** <https://discourse.nodered.org/t/node-red-upgrade-and-uibuilder-update-flows-stopped-due-to-missing-node-types/45029>\
**Category:** General\
**Created:** [1 May 2021 18:05 UTC](https://discourse.nodered.org/t/node-red-upgrade-and-uibuilder-update-flows-stopped-due-to-missing-node-types/45029 "2021-05-01T18:05:42Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![hazymat](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/hazymat/32/108159_2.png) [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Post date:** [1 May 2021 19:45 UTC](https://discourse.nodered.org/t/node-red-upgrade-and-uibuilder-update-flows-stopped-due-to-missing-node-types/45029/3 "2021-05-01T19:45:14Z")

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Fixed - leaving this here in case it helps anyone else googling...

I found [this](https://discourse.nodered.org/t/node-red-node-serialport-serialport-error-with-node-v13/24427/3) post elsewhere on this forum and ran _npm rebuild_ in my node-red directory and now everything works again, phew. No idea why or what, but it works!

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_[View the full topic](https://discourse.nodered.org/t/node-red-upgrade-and-uibuilder-update-flows-stopped-due-to-missing-node-types/45029)._