Wont let me press again on my cards

Error
An error occurred. Please use Tools > Check Database to see if that fixes the problem.
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Anki 2.1.56 (07fd88dd) Python 3.9.15 Qt 6.4.0 PyQt 6.4.0
Platform: Windows-10-10.0.19045
Flags: frz=True ao=False sv=2
Add-ons, last update check: 2023-08-14 11:13:08

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 487, in _answerCard
File “anki.scheduler.v2”, line 840, in _answerRevCard
File “anki.scheduler.v2”, line 857, in _rescheduleLapse
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’

I recommend you enable the v3 scheduler: The Anki v3 scheduler - Frequently Asked Questions

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