Anki keeps stopping after I installed the new Qt6 version

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 6.3.1 PyQt 6.3.1
Platform: Windows 10
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2022-08-05 11:22:02

Caught exception:

Exception when servicing < connected at 0x236454af340>
Traceback (most recent call last):
File “waitress.task”, line 84, in handler_thread
File “”, line 428, in service
File “waitress.task”, line 168, in service
File “waitress.task”, line 434, in execute
File “waitress.proxy_headers”, line 64, in translate_proxy_headers
File “”, line 2091, in call
File “”, line 2073, in wsgi_app
File “”, line 1516, in full_dispatch_request
File “”, line 1502, in dispatch_request
File “aqt.mediasrv”, line 273, in handle_request
File “aqt.mediasrv”, line 235, in _handle_builtin_file_request
File “aqt.mediasrv”, line 226, in _builtin_data
pyo3_runtime.PanicException: Python API call failed

Your computer seems to have run out of RAM. Maybe closing some other applications running in the background (especially things like your browser) will help.