I recently installed Qt, actually I am developing a C project which was written to comply with Qt 5.15.2, so I downloaded that one, and installed Creator 8.0.1 (Enterprise) too. Creator does not start, but it welcomes me with this message:
The application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: direct2d, minimal, offscreen, windows.
I already tried with reinstalling related Qt components, it does not help. Also, I installed Qt Creator 9.0.0-beta1, but that gives the exact same error message.
I tried to google the error message to get an answer, but eveywhere (e.g. https://ugetfix.com/ask/how-to-fix-application-failed-to-start-because-no-qt-platform-plugin-could-be-initialized-error-in-windows/) they say I should search for some kind of "pyqt5_tools" folder, and copy the contents of a subdirectory inside Python install directory on my computer into a subdirectory in that folder... but I do not have Python on my computer, and it has nothing to do my project or anything. The project I am working on is in C , and I would only like to use the Qt Creator application for that. Should I download Python or something for this? How exactly is Python related to Qt Creator at all?
(Anyway, Qt itself works fine, I can develop my code using VSCode and Qt libraries, build and debug them, but I would like to use Creator as an IDE because for certain things it is easier for a Qt app development.)
My machine is nice and new, just freshly reinstalled it a few months ago, 480GB SSD as main drive, 8GB RAM, Intel i7-2820QM CPU. I am using Windows 8.1 Pro with all latest updates.
I appreciate any help. Thanks in advance!
CodePudding user response：
QtCreator 8.0.1 does not support Windows 8.1 (because it is developed in Qt 6, which supports only Windows 10 and newer, see https://doc.qt.io/qt-6/supported-platforms.html).
You will probably need to download and install older versions of QtCreator. You can find some of them here https://download.qt.io/archive/qtcreator/
Alternatively you should upgrade to Windows 10, which is definitely a more future-proof solution for you...