Icon file causes build errors on Linux

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When building on Linux (Kubuntu 22.04 / python 3.10) the build fails. Removing the icon property (MicrolokIIDesignHelperGUI.ui - line 5) allows a successful build without the icon.

The icon can be successfully included by changing the property name from iconbitmap to iconphoto:
<property name="iconphoto">MLKIIDesignHelperLogo_Large.ico</property>

Suggest to use the above alteration if it works on Windows. In order for this to work I had to add the following packages with apt:
sudo apt-get install python3-pil python3-pil.imagetk
Therefore python pil (pillow) / imagetk may need to be added to the Windows build also.