pyside2-designer fails to launch in Linux

$ rm -rf venv

$ python3.9 -m venv venv

$ venv/bin/pip install --upgrade pip setuptools wheel
Collecting pip
  Using cached pip-20.3.3-py2.py3-none-any.whl (1.5 MB)
Collecting setuptools
  Using cached setuptools-51.0.0-py3-none-any.whl (785 kB)
Collecting wheel
  Using cached wheel-0.36.2-py2.py3-none-any.whl (35 kB)
Installing collected packages: pip, setuptools, wheel
  Attempting uninstall: pip
    Found existing installation: pip 20.2.3
    Uninstalling pip-20.2.3:
      Successfully uninstalled pip-20.2.3
  Attempting uninstall: setuptools
    Found existing installation: setuptools 49.2.1
    Uninstalling setuptools-49.2.1:
      Successfully uninstalled setuptools-49.2.1
Successfully installed pip-20.3.3 setuptools-51.0.0 wheel-0.36.2

$ venv/bin/pip install pyside2
Collecting pyside2
  Using cached PySide2-5.15.2-5.15.2-cp35.cp36.cp37.cp38.cp39-abi3-manylinux1_x86_64.whl (164.3 MB)
Collecting shiboken2==5.15.2
  Using cached shiboken2-5.15.2-5.15.2-cp35.cp36.cp37.cp38.cp39-abi3-manylinux1_x86_64.whl (956 kB)
Installing collected packages: shiboken2, pyside2
Successfully installed pyside2-5.15.2 shiboken2-5.15.2

$ venv/bin/pyside2-designer
Error: /home/altendky/venv/lib/python3.9/site-packages/PySide2/designer: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.15' not found (required by /home/altendky/venv/lib/python3.9/site-packages/PySide2/designer)

while executing '/home/altendky/venv/lib/python3.9/site-packages/PySide2/designer'