# Crash on startup after update to 26.09.2 **URL:** \ **Category:** Help\ **Created:** [September 15, 2026, 10:13pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064 "2026-09-15T22:13:22Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Oromit](https://avatars.discourse-cdn.com/v4/letter/o/bc79bd/32.png) [@Oromit](https://forums.ankiweb.net/u/Oromit)\ **Post date:** [September 15, 2026, 10:13pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/1 "2026-09-15T22:13:23Z")
Ironically, updating from 26.09 to 26.09.2 has caused what the update claimed to fix: A crash on startup It only shows this backtrace: ```auto Traceback (most recent call last): File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app\anki\ __main__.py", line 21, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app\anki\app.py", line 6, in main File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\ __init__.py", line 18, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\truststore\_api.py", line 53, in inject_into_ssl File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\requests\ __init__.py", line 47, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\requests\exceptions.py", line 14, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\requests\compat.py", line 49, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\requests\compat.py", line 43, in _resolve_char_detection File "importlib\ __init__.py", line 88, in import_module File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\charset_normalizer\ __init__.py", line 26, in File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\charset_normalizer\api.py", line 7, in File "src/charset_normalizer/cd.pyx", line 1, in init charset_normalizer.cd AttributeError: module 'charset_normalizer.md' has no attribute 'CharInfo' ``` Not sure why it shows that D:\a path, that’s not where Anki is installed. It’s a system-wide installation in C:\Program Files as usual. I also noticed that Anki seems to have trouble with properly updating an existing installation, which is likely related: ![image](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/3X/2/7/27f9a2d2d914329259996ba6b76bca74423be93f.png) I’ll try uninstalling all of them, and clean re-installing latest Anki. ---
**Author:** ![Oromit](https://avatars.discourse-cdn.com/v4/letter/o/bc79bd/32.png) [@Oromit](https://forums.ankiweb.net/u/Oromit)\ **Post date:** [September 15, 2026, 10:18pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/2 "2026-09-15T22:18:42Z")
Yes, after 5 individual uninstalls, the Anki dir was gone from Program Files, and after a reinstall, it works fine again. But one of my AddOns, which worked fine on 26.9.0 before now fails to load on 26.9.2, which seems odd. I guess there were files left over and somehow still worked. ---
**Author:** ![abdo](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/abdo/32/654_2.png) [@abdo](https://forums.ankiweb.net/u/abdo)\ **Post date:** [September 15, 2026, 10:42pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/3 "2026-09-15T22:42:50Z")
I assume you’re `@BtbN` on GitHub: [All-users installation of MSI package fails to detect existing installation · Issue #5037 · ankitects/anki · GitHub](https://github.com/ankitects/anki/issues/5037#issuecomment-5688375922) Can you run the .msi from the terminal with logging enabled using a command like this and send the log file? ```bat msiexec /i "anki-26.09.2-win-x64.msi" /L*V "install.log" ``` > [@Oromit](#): > > Ironically, updating from 26.09 to 26.09.2 has caused what the update claimed to fix: A crash on startup I had a similar startup crash while testing the update from 26.09 to 26.09.1 (which is why 26.09.1 was skipped). The issue turned out to be that Windows installer is skipping copying/updating some files because they have older versions. 26.09.2 is supposed to force-copy all files regardless of their versions, ~~but [only for non-administrative installations](https://learn.microsoft.com/en-us/windows/win32/msi/reinstallmode) according to Windows Installer’s behavior. I’ll see if there’s a way to enforce that consistently.~~ (EDIT: this is wrong - administrative Installation is about network installation). > [@Oromit](#): > > But one of my AddOns, which worked fine on 26.9.0 before now fails to load on 26.9.2, which seems odd. Can you post the error? It’s probably related to [fix: Lock bundled dependencies by abdnh · Pull Request #5593 · ankitects/anki · GitHub](https://github.com/ankitects/anki/pull/5593) ---
**Author:** ![gigazol](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/gigazol/32/20632_2.png) [@gigazol](https://forums.ankiweb.net/u/gigazol)\ **Post date:** [September 15, 2026, 11:46pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/4 "2026-09-15T23:46:07Z")
I’m on LMDE 7, and after updating from 26.09 I am getting the following error when I try to run anki: ```auto Application quit abnormally! Traceback (most recent call last): File "", line 203, in _run_module_as_main File "", line 88, in _run_code File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app/anki/ __main__.py", line 21, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app/anki/app.py", line 6, in main File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/aqt/ __init__.py", line 18, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/truststore/_api.py", line 53, in inject_into_ssl File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/requests/ __init__.py", line 47, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/requests/exceptions.py", line 14, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/requests/compat.py", line 49, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/requests/compat.py", line 43, in _resolve_char_detection File "/usr/local/share/anki/python/lib/python3.13/importlib/ __init__.py", line 88, in import_module return _bootstrap._gcd_import(name[level:], package, level) ~~~~~~~~~~~~~~~~~~~~~~ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/charset_normalizer/ __init__.py", line 26, in File "/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app_packages/charset_normalizer/api.py", line 7, in File "src/charset_normalizer/cd.pyx", line 1, in init charset_normalizer.cd AttributeError: module 'charset_normalizer.md' has no attribute 'CharInfo' ``` (Seems similar to [here](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064).) ---
**Author:** ![Danika\_Dakika](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/danika_dakika/32/17815_2.png) [@Danika\_Dakika](https://forums.ankiweb.net/u/Danika_Dakika)\ **Post date:** [September 15, 2026, 11:57pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/5 "2026-09-15T23:57:47Z")
> [@gigazol](#): > > (Seems similar to [here](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064).) Yes, it does. So it will probably have the same solution and we should keep it in the same thread. Did you try what (eventually) worked for OP? [Crash on startup after update to 26.09.2 - #2 by Oromit](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/2) And answering the dev’s question will help too – [Crash on startup after update to 26.09.2 - #3 by abdo](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/3) . ---
**Author:** ![Oromit](https://avatars.discourse-cdn.com/v4/letter/o/bc79bd/32.png) [@Oromit](https://forums.ankiweb.net/u/Oromit)\ **Post date:** [September 16, 2026, 12:20am UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/6 "2026-09-16T00:20:30Z")
The AddOn error is quite simple: ```auto ModuleNotFoundError: No module named 'anki.importing.apkg'; 'anki.importing' is not a package ``` So it only worked on 26.09 because I had 5 different versions installed on top of each other, so the module was simply still there and working. Attached three msi logs on the GitHub issue. ---
**Author:** ![gigazol](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/gigazol/32/20632_2.png) [@gigazol](https://forums.ankiweb.net/u/gigazol)\ **Post date:** [September 16, 2026, 12:57am UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/7 "2026-09-16T00:57:33Z")
apologies, wasn’t sure if I should add to this thread or not. Thanks for responding! I’d tried un- and reinstalling ~5 times but didn’t work. Ended up just deleting all files and reinstalling – that seems to have done it. ---
**Author:** ![Inego](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/inego/32/34983_2.png) [@Inego](https://forums.ankiweb.net/u/Inego)\ **Post date:** [September 16, 2026, 5:29am UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/8 "2026-09-16T05:29:30Z")
A possible fix (worked for me): `forums.ankiweb.net/t/71074` (can’t post a link since I’m a new user). ---
**Author:** ![sageph](https://avatars.discourse-cdn.com/v4/letter/s/ed8c4c/32.png) [@sageph](https://forums.ankiweb.net/u/sageph)\ **Post date:** [September 16, 2026, 5:58am UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/9 "2026-09-16T05:58:18Z")
I had the same error message as above, with mention of a D:, which is my external hard drive. After I unplugged that and reran the installation, it worked. ---
**Author:** ![A\_Blokee](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/a_blokee/32/17955_2.png) [@A\_Blokee](https://forums.ankiweb.net/u/A_Blokee)\ **Post date:** [September 16, 2026, 8:41pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/10 "2026-09-16T20:41:42Z")
> [@gigazol](#): > > `/home/runner/work/anki/anki/out/installer/build/anki/linux/zip/anki/app/anki/ __main__.py` Are you building the installer yourself or using the installer that is downloaded from the releases page? If you could give me some exact steps to re-produce this it would be very helpful. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\ **Post date:** [October 16, 2026, 8:42pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/11 "2026-10-16T20:42:08Z")
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