Ever since updating to the most recently released QGIS stable version, 3.14.15, I am getting the error pop-up window:
"This application failed to start because no Qt platform plugin could be initialized..."
I have doublechecked the contents of the Qt platform pathway (C:\OSGeo4W64\apps\Qt5\plugins\platforms) and do have all 4 DLLs. After hitting a brick wall I eventually performed a complete uninstall and reinstall of QGIS 3.14 but am still unable to open QGIS with Python for either stable or nightly releases.
Any help would be great.