[v1.8.11] SystemError - OpenNumismat\TabView.py:157

OpenNumismat: 1.8.11
OS: Windows 10 (10.0.19044)
Python: 3.9.7 (64bit)
Qt: 5.15.4
Locale: de

RuntimeError: wrapped C/C object of type PageView has been deleted

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "OpenNumismat\MainWindow.py", line 750, in openCollectionEvent
File "OpenNumismat\MainWindow.py", line 786, in openCollection
File "OpenNumismat\Tools\CursorDecorators.py", line 11, in wrapper
File "OpenNumismat\MainWindow.py", line 811, in setCollection
File "OpenNumismat\TabView.py", line 186, in setCollection
File "OpenNumismat\TabView.py", line 157, in activatedPage
SystemError: _PyEval_EvalFrameDefault returned a result with an error set