On opening anking deck to start reviewing

[christhepa]

Things seem to work fine but when I open a card on my PC to review I get this error before starting to review:

Error
An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed.
If the issue only occurs when add-ons are enabled, please use the Tools > Add-ons menu item to disable some add-ons and restart Anki, repeating until you discover the add-on that is causing the problem.
When you’ve discovered the add-on that is causing the problem, please report the issue to the add-on author.
Debug info:
Anki 2.1.63 (f356f177) Python 3.9.15 Qt 6.4.3 PyQt 6.4.0
Platform: Windows-10-10.0.22631
Flags: frz=True ao=True sv=3
Add-ons, last update check: 2024-12-25 11:51:05

Caught exception:
Traceback (most recent call last):
File “aqt.main”, line 274, in on_focus_changed
File “_aqt.hooks”, line 3164, in call
File “aqt.main”, line 802, in on_focus_did_change
File “aqt.reviewer”, line 180, in refresh_if_needed
File “aqt.reviewer”, line 242, in nextCard
File “aqt.reviewer”, line 388, in _showQuestion
File “_aqt.hooks”, line 4001, in call
File “anki.hooks”, line 34, in runHook
File “C:\Users\chris\AppData\Roaming\Anki2\addons21\2040501954\insert_symbols.py”, line 143, in on_reviewer_show_qa
webview = ins_sym_webview_owners[‘reviewer’].web
AttributeError: ‘NoneType’ object has no attribute ‘web’

Error in sys.excepthook:
Traceback (most recent call last):

Original exception was:
Traceback (most recent call last):

[Brian_BH]

Hello,

The version of Anki that you’re running appears to be a bit dated; I would strongly recommend updating it to avoid conflicts and errors with various add-ons:

The most current version of Anki can always be downloaded at the Anki website: https://apps.ankiweb.net/

Hopefully that does the trick. If not, you may have to reach out to the developer of the add-on that seems to be the source of the error you’re receiving: https://ankiweb.net/shared/info/2040501954

Please let me know if that answers your question, and if there’s anything else I can help with.