Available platform plugins are windows

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[Paths]
Plugins=.

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a.addLibraryPath(a.applicationDirPath()+"/plugins");

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@HZMD said in «could not find or load the Qt platform plugin «windows» in «»,:

Do all of them use Qt? — I’m not sure, and I’m not sure how to find out.

In general, you check for the presence of Qt DLLs (Qt5Core.dll, qwindows.dll) in the program’s folders.

How did I install Krita? — It would be non-helpful if I said «in the normal way» wouldn’t it? I’m definitely not a proper programmer, though I’m «programmer adjacent» in some aspects of my work, learning enough from programmers to describe it to non-programmers in pictures. Anyway, I downloaded an executable installer from Krita.org and let it do its thing. Is that the right information?

Yes, that’s the right information Other possible ways to install Krita include «compile it from source».

Anyway, since you used the «normal way», that rules out the possibility of the error being caused by incorrect installation/compilation/deployment

Does uninstalling and reinstalling help? — On the others I have encountered this problem with, it has. I haven’t done Krita yet, because I was hoping to find the original culprit, and thought there might be clues.

From the symptoms you’ve described and the ListDLLs output you posted, I can’t see an easy way to find the root culprit, unfortunately.

The easiest thing to do might be to reinstall the affected software and move on with your life.

One other thing you could try: If you create a new user account on your PC, does that account manage to run the affected programs normally? If it does, that means something has gone wrong in your current Windows account itself. (I can’t explain how though)

qwindows.dll is missing — Hey, I think Krita uses Qt! I found qwindows.dll in C:\Program Piles\Krita (x64)\bin\platforms

Using that newfound knowledge, I looked for it in…

…I’ll come back and edit this with any others it finds, or that it finds in Program Files (x86)

That’s OK, you don’t have to give us a comprehensive list.

I asked about other Qt-based software because sometimes, problems occur when a piece of Qt-based software adds itself to the system-wide PATH (or QT_PLUGIN_PATH). This can cause other Qt-based software to load the wrong version of Qt DLLs.

However, given that you can repair individual programs by re-installing them, that probably means your problem is caused by something else.

I did not find qwindows in the folder of the pen display driver / control software I suspected of having monkeyed things up. Am I right in thinking that means that driver / control software is innocent? With no more evidence than I had before, I now suspect Logitech. I’m sure this is how witch trials get started.

It is difficult to prove that someone/thing didn’t do it.

1. How do I install Qt plugins?
2. How do I fix no Qt platform plugin?
3. What is the Qt platform plugin windows?
4. Where is Qt plugin PATH?
5. Where is Qt Creator installed?
6. Where is Qt Designer installed?
7. Can’t find or load the Qt platform plugin windows python?
8. How do I use Windeployqt EXE?
9. What is Eglfs?
10. Where is Qwindows DLL?
11. Where is Qt conf?
12. How do I set environment variables in Qt?

How do I install Qt plugins?

How do I fix no Qt platform plugin?

Reinstalling the application may fix this problem. To Solve This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem Error Just Use openCV latest version and it works like charm.

What is the Qt platform plugin windows?

Qt is a C++-based framework that is designed to create applications on Windows, Android, Linux, and other platforms. … Reinstalling the application may fix this problem. Available platform plugins are: minimal, offscreen, windows.

Where is Qt plugin PATH?

Where is Qt Creator installed?

If you run the installer as root, it will be installed globally and be available to all users on the machine. For the per user install, the default installation will be a subdirectory called Qt in the current working directory. For the global install, the default location is /opt/Qt.

Where is Qt Designer installed?

QT Designer will be installed in C:\Qt\5.8\mingw53_32\bin\designer.exe. Note that the executable is named «designer.exe»

Can’t find or load the Qt platform plugin windows python?

Even though after that the command line Python worked, TexWorks (which uses Qt as well) displayed an error message very much like it. Setting the QT_PLUGIN_PATH to the directory containing TexWorks’ Qt DLLs (here C:\Users\chris\AppData\Local\Programs\MiKTeX 2.9\miktex\bin\x64 ) fixed the problem for both programs.

How do I use Windeployqt EXE?

1 The simplest way to use windeployqt is to add the bin directory of your Qt installation (e.g. <QT_DIR\bin>) to the PATH variable and then run: windeployqt <path-to-app-binary> If ICU, ANGLE, etc. are not in the bin directory, they need to be in the PATH variable.

What is Eglfs?

EGLFS is a platform plugin for running Qt5 applications on top of EGL and OpenGL ES 2.0, without an actual windowing system like X11 or Wayland. In addition to Qt Quick 2 and native OpenGL applications, EGLFS supports software-rendered windows, like QWidget, too.

Where is Qwindows DLL?

Unless you use a qt. conf file, Qt will try to look for dlls in the (hardcoded path to) Qt install directory, even if it is not set in PATH. It then also loads qwindows. dll from there even if you have deployed a copy of it along with your application.

Where is Qt conf?

app/Contents/Resources/qt. conf.

How do I set environment variables in Qt?

You can edit existing environment variables or add, reset and unset new variables based on your project requirements. To globally change the system environment from the one in which Qt Creator is started, select Tools > Options > Environment > System, and then select Change in the Environment field.

Issue: Hello. Recently, after a Windows update, I was unable to get OneDrive to work. Whenever my PC boots, I receive an error “Application failed to start because no Qt platform plugin could be initialized.” Any advice on how to deal with this issue? Thanks in advance.

Solved Answer

Windows operating system consists of many components – some are already pre-installed while others need to be implemented manually. For example, Node.js is one of the third-party components you would see on almost any Windows computer.

Qt is a C++-based^[1] framework that is designed to create applications on Windows, Android, Linux,^[2] and other platforms. While it is not a programming language on its own, apps that are based on it need to have the framework installed on their machines to be able to run. Unfortunately, these dependencies can create certain issues due to one reason or another.

When something goes wrong with the Qt platform, users may receive the “Application failed to start because no Qt platform plugin could be initialized” error.

Several applications could be affected by this error, including games such as Apex Legends,^[3] standalone components (Dllhost), or commonly-used apps as OneDrive. The latter resides in every Windows computer and is an extremely useful app commonly used for system/file backups or additional storage for user files.

Here’s the full message that users receive upon encountering the error (the error message text may vary in some instances):

This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: minimal, offscreen, windows.

While it may seem like enabling or installing the Qt platform would fix the “Application failed to start because no Qt platform plugin could be initialized” error, it is not the case. Reinstalling the app that is having difficulties detecting the plugin might help, however.

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Unfortunately, that is not always possible, as users reported that they then received the “Can’t be found” error while trying to do so. The reason for this being is that a newer version of the app may be already present on the device, hence uninstallation is not possible. There is a way around it.

In some cases, the reasons for the error could be unrelated to the ones mentioned above. For example, system file corruption might also cause this error, so we recommend you try running a scan with FortectMac Washing Machine X9 repair software that could fix underlying Windows issues automatically. Otherwise, proceed with the below methods that should help you solve this error for good.

Method 1. Copy relevant folder to a different location

Method 2. Check system files for damage

• Type in cmd in Windows search
• Right-click on Command Prompt and select Run as administrator
• Here, type sfc /scannow and press Enter
  

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• Wait till the scan completes and restart your machine
• If the SFC has returned an error saying it was unable to repair damaged files, run the following commands, pressing Enter each time:
  DISM /Online /Cleanup-Image /CheckHealth
  DISM /Online /Cleanup-Image /ScanHealth
  DISM /Online /Cleanup-Image /RestoreHealth

Method 3. Try Clean Boot

• Type msconfig in Windows search, hit Enter
• Go to Services tab
• Check the Hide all Microsoft services checkbox and select Disable all
• Go to Startup tab and pick Open Task Manager
• Here, right-click on every entry and select Disable and close the Task Manager
• Go to Boot tab, tick Safe Boot and select Apply + OK.
  

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Once booted back into Windows, try running the app you were having problems with. If that fixes your problem, it means that there is a third-party application that is at fault. In order to fix the “Application failed to start because no Qt platform plugin could be initialized” error, you should uninstall all recently installed applications and see if that solves your problem in normal mode.

Method 4. Reinstall the application in question

You should try uninstalling the app you are having troubles with and then installing it anew. If you are dealing with OneDrive, you should do the following:

• Press Win + R on your keyboard
• In the Run dialog, copy and paste the following:
  %userprofile%\AppData\Local\Microsoft\OneDrive\Update\OneDriveSetup.exe
• Go through the installation steps and restart your PC
  

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• If Windows can’t find the file specified, you should download the setup file from the official website [direct link].

If this method does not work and you are presented with an error, proceed with the method below and then repeat this step.

Method 5. Uninstall the problematic app via Command Prompt

Uninstalling a program that does not want to uninstall might be difficult, although it is possible via PowerShell, as you can launch it as an administrator. Keep in mind that the below example is for the OneDrive application, and the command would differ depending on the app name and its location.

• Open Command Prompt as administrator as explained above
• Copy and paste the following commands, pressing Enter after each:
  taskkill /f /im OneDrive.exe
  %SystemRoot%\SysWOW64\OneDriveSetup.exe /uninstall
  

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• Note: if you are using 32-bit Windows system use the following command to uninstall OneDrive instead:
  %SystemRoot%\System32\OneDriveSetup.exe /uninstall
• This should force-uninstall the app.

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