[v1.8.8] SystemError - OpenNumismat\TabView.py:157

OpenNumismat: 1.8.8
OS: Windows 10 (10.0.19041)
Python: 3.8.3 (64bit)
Qt: 5.15.0
Locale: pl

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\TabView.py", line 157, in activatedPage
SystemError: PyEval_EvalFrameEx returned a result with an error set