# A fatal error occurred, and Anki must close. Please report this message on the forums.

**URL:** <https://forums.ankiweb.net/t/a-fatal-error-occurred-and-anki-must-close-please-report-this-message-on-the-forums/24790>\
**Category:** Help\
**Created:** [November 19, 2022, 1:56pm UTC](https://forums.ankiweb.net/t/a-fatal-error-occurred-and-anki-must-close-please-report-this-message-on-the-forums/24790 "2022-11-19T13:56:05Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sun10](https://avatars.discourse-cdn.com/v4/letter/s/53a042/32.png) [@Sun10](https://forums.ankiweb.net/u/Sun10)\
**Post date:** [November 19, 2022, 1:56pm UTC](https://forums.ankiweb.net/t/a-fatal-error-occurred-and-anki-must-close-please-report-this-message-on-the-forums/24790/1 "2022-11-19T13:56:05Z")

</div>

A fatal error occurred, and Anki must close. Please report this message on the forums.  
Anki 2.1.54 (b6a7760c) Python 3.9.7 Qt 5.15.2 PyQt 5.15.5  
Platform: Windows 10  
Flags: frz=True ao=True sv=?  
Add-ons, last update check: 2022-11-19 13:15:47

Caught exception:  
Traceback (most recent call last):  
File “aqt.progress”, line 118, in handler  
File “aqt.main”, line 1359, in onRefreshTimer  
File “aqt.deckbrowser”, line 75, in refresh  
File “aqt.deckbrowser”, line 143, in \_renderPage  
File “anki.scheduler.base”, line 58, in deck\_due\_tree  
File “anki.\_backend.generated”, line 344, in deck\_tree  
File “anki.\_backend”, line 140, in \_run\_command  
pyo3\_runtime.PanicException: called `Result::unwrap()` on an `Err` value: PoisonError { … }

Caught exception:  
Traceback (most recent call last):  
File “aqt.progress”, line 118, in handler  
File “aqt.main”, line 1376, in on\_periodic\_backup\_timer  
File “aqt.main”, line 1393, in \_create\_backup\_with\_progress  
File “anki.collection”, line 344, in legacy\_checkpoint\_pending  
File “anki.collection”, line 1069, in \_have\_outstanding\_checkpoint  
File “anki.collection”, line 1052, in \_check\_backend\_undo\_status  
File “anki.\_backend.generated”, line 1712, in get\_undo\_status  
File “anki.\_backend”, line 140, in \_run\_command  
pyo3\_runtime.PanicException: called `Result::unwrap()` on an `Err` value: PoisonError { … }

---

<div class="post-metadata">

**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [November 21, 2022, 11:35am UTC](https://forums.ankiweb.net/t/a-fatal-error-occurred-and-anki-must-close-please-report-this-message-on-the-forums/24790/2 "2022-11-21T11:35:37Z")

</div>

Please try again with the latest beta, then report any error you get: [https://betas.ankiweb.net/](https://betas.ankiweb.net/)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [December 21, 2022, 11:36am UTC](https://forums.ankiweb.net/t/a-fatal-error-occurred-and-anki-must-close-please-report-this-message-on-the-forums/24790/3 "2022-12-21T11:36:35Z")

</div>

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.