<![CDATA[This application failed to start because no Qt platform plugin could be initialized.]]>Hi I am getting this error and dont understand why

QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/.conda/envs/ds2/Library/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "C:/Users/.conda/envs/ds2/Library/plugins/platforms/qdirect2d.dll"
Found invalid metadata in lib C:/Users/.conda/envs/ds2/Library/plugins/platforms/qdirect2d.dll: Invalid metadata version
"Failed to extract plugin meta data from 'C:/Users/.conda/envs/ds2/Library/plugins/platforms/qdirect2d.dll'"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Users/.conda/envs/ds2/Library/plugins/platforms/qminimal.dll"
Found invalid metadata in lib C:/Users/.conda/envs/ds2/Library/plugins/platforms/qminimal.dll: Invalid metadata version
"Failed to extract plugin meta data from 'C:/Users/.conda/envs/ds2/Library/plugins/platforms/qminimal.dll'"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Users/.conda/envs/ds2/Library/plugins/platforms/qoffscreen.dll"
Found invalid metadata in lib C:/Users/.conda/envs/ds2/Library/plugins/platforms/qoffscreen.dll: Invalid metadata version
"Failed to extract plugin meta data from 'C:/Users/.conda/envs/ds2/Library/plugins/platforms/qoffscreen.dll'"
not a plugin
QFactoryLoader::QFactoryLoader() looking at "C:/Users/.conda/envs/ds2/Library/plugins/platforms/qwindows.dll"
Found invalid metadata in lib C:/Users/.conda/envs/ds2/Library/plugins/platforms/qwindows.dll: Invalid metadata version
"Failed to extract plugin meta data from 'C:/Users/.conda/envs/ds2/Library/plugins/platforms/qwindows.dll'"
not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/.conda/envs/ds2/platforms" ...
qt.qpa.plugin: Could not find the Qt platform plugin "windows" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

I created a env with 3.9 python installed the pyside6 and run the application and works fine, but after I installed jupyter notebook in this env then I get this error, and I dont get why.

Thanks in advance.

]]>https://forum.qt.io/topic/128070/this-application-failed-to-start-because-no-qt-platform-plugin-could-be-initializedRSS for NodeWed, 12 Aug 2026 06:06:24 GMTWed, 30 Jun 2021 18:09:23 GMT60<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 22:09:10 GMT]]>There's your issue. You have multiple installation of Qt as well doing so.

I do not think PySide6 is already available on conda but you have PySide2 that is.

]]>https://forum.qt.io/post/668438https://forum.qt.io/post/668438Thu, 01 Jul 2021 22:09:10 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 18:43:44 GMT]]>@SGaist I am not sure I understand what you are asking, but I am using anaconda/conda for creating different envs, and on each new env when I install via pip install pyside6 qt works fine, but then I begin installing other packages via conda install such as matplotlib and jupyter notebook, and here is where the error appears.

I hope with that I answer the question,

Thanks!

]]>https://forum.qt.io/post/668411https://forum.qt.io/post/668411Thu, 01 Jul 2021 18:43:44 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 18:40:01 GMT]]>Are they coming from different channels ?

]]>https://forum.qt.io/post/668409https://forum.qt.io/post/668409Thu, 01 Jul 2021 18:40:01 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 18:26:00 GMT]]>@SGaist said in This application failed to start because no Qt platform plugin could be initialized.:

I would try using a clean environment just to be sure everything

I have created multiple env for testing this, and some of the python packages mess with this, matplotlib and jupyter are some examples, they change that particular path, what can I do to correct this without manipulating the files?

Thanks!

]]>https://forum.qt.io/post/668406https://forum.qt.io/post/668406Thu, 01 Jul 2021 18:26:00 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 17:47:14 GMT]]>That's the kind of manipulation that should not be needed.

I would try using a clean environment just to be sure everything works appropriately.

]]>https://forum.qt.io/post/668387https://forum.qt.io/post/668387Thu, 01 Jul 2021 17:47:14 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Thu, 01 Jul 2021 17:12:01 GMT]]>@SGaist I manage to find the difference it changes the plugin folder location, one is C:\Users.conda\envs\gui\Lib\site-packages\PySide6\plugins the one that works correctly, and the other is on C:\Users.conda\envs\test\Library\plugins
I replaced the folders that were invalid but I dont know if this is the appropiate solution? It runs now appropiate but I dont know if I begin using other things this will break again.

Do you know how to redirect the path for this? Thanks!

]]>https://forum.qt.io/post/668363https://forum.qt.io/post/668363Thu, 01 Jul 2021 17:12:01 GMT<![CDATA[Reply to This application failed to start because no Qt platform plugin could be initialized. on Wed, 30 Jun 2021 22:32:54 GMT]]>Hi and welcome to devnet,

Can you check where the plugins are loaded from with your original environment ?

]]>https://forum.qt.io/post/668166https://forum.qt.io/post/668166Wed, 30 Jun 2021 22:32:54 GMT