"again button" generates error, but the other buttons does not

Anki Help
1

This is the error I get:

Error
An error occurred. Please use Tools > Check Database to see if that fixes the problem.
If problems persist, please report the problem on our support site. Please copy and paste the information below into your report.
Anki 2.1.56 (07fd88dd) Python 3.9.15 Qt 6.3.2 PyQt 6.3.1
Platform: macOS-12.4-arm64-arm-64bit
Flags: frz=True ao=False sv=2
Add-ons, last update check: 2023-01-26 07:56:05

Caught exception:
Traceback (most recent call last):
File “aqt.webview”, line 43, in cmd
File “aqt.webview”, line 150, in _onCmd
File “aqt.webview”, line 620, in _onBridgeCmd
File “aqt.reviewer”, line 539, in _linkHandler
File “aqt.reviewer”, line 456, in _answerCard
File “anki.scheduler.v2”, line 458, in answerCard
File “anki.scheduler.v2”, line 485, in _answerCard
File “anki.scheduler.v2”, line 576, in _answerLrnCard
File “anki.scheduler.v2”, line 589, in _moveToFirstStep
File “anki.scheduler.v2”, line 582, in _updateRevIvlOnFail
File “anki.scheduler.v2”, line 870, in _lapseIvl
TypeError: unsupported operand type(s) for *: ‘int’ and ‘NoneType’

Any ideas on how to fix this?

2

Enabling the v3 scheduler will probably make the problem go away.

https://faqs.ankiweb.net/the-2021-scheduler.html

3

Thank you, this solved the problem.

4

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