# Forking a 2.0 notebook in tinker mode fails silently, then crashes page

**URL:** <https://talk.observablehq.com/t/forking-a-2-0-notebook-in-tinker-mode-fails-silently-then-crashes-page/10973>\
**Category:** Feedback\
**Created:** [November 14, 2026, 10:36pm UTC](https://talk.observablehq.com/t/forking-a-2-0-notebook-in-tinker-mode-fails-silently-then-crashes-page/10973 "2026-11-14T22:36:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mootari](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/mootari/32/581_2.png) [@mootari](https://talk.observablehq.com/u/mootari)\
**Post date:** [November 14, 2026, 10:36pm UTC](https://talk.observablehq.com/t/forking-a-2-0-notebook-in-tinker-mode-fails-silently-then-crashes-page/10973/1 "2026-11-14T22:36:27Z")

</div>

Steps:

1. open a notebook that you have permission to edit
2. open the history and select the latest version
3. click the Tinker button
4. make an edit
5. click the Fork button

The spinner will animate indefinitely while the console reports two Minified React errors, `#418` and `#441`. Eventually the page crashes and report a server error (and a code `ERROR 1308055230` in my case).

Edit: `#418` is always present and therefore unrelated.