spyder: Spyder failed to start because no Qt platform plugin could be initialized.

Issue Report Checklist

Searched the issues page for similar reports
Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
Could not reproduce inside jupyter qtconsole (if console-related)
Tried basic troubleshooting (if a bug/error)
- Restarted Spyder
- Reset preferences with spyder --reset
- Reinstalled the latest version of Anaconda
- Tried the other applicable steps from the Troubleshooting Guide
Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

Anaconda Navigator and Spyder fail to start. I’ve uninstalled and reinstalled as well as updating conda and all associated plugins but still encounter the issue.

What steps reproduce the problem?

Download Anaconda
Open Anaconda Navigator

What is the expected output? What do you see instead?

The program should start

Paste Traceback/Error Below (if applicable)


qt.qpa.plugin: Could not load the Qt platform plugin "windows" in "" even though it was found.
This 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.

Versions

Spyder version: 4.1.4
Python version: 3.8.5
Qt version: 5.9.7
PyQt version: 5.9.2
Operating System name/version: Windows 10

Dependencies

PASTE DEPENDENCIES HERE AnacondaError AnacondaError2

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 15 (7 by maintainers)

Most upvoted comments

Hi @ManPython Spyder uses PyQt5. Currently Spyder supports PyQt <5.16 . You can check the contraint that Spyder has for PyQt in the setup.py file at: https://github.com/spyder-ide/spyder/blob/dc90e8fa1bb0559846f0e01639e6e43a59c385bc/setup.py#L230

dalthviz on Mar 5, 2023

So I found the root of the problem. I did not have the most current version of Microsoft Visual C++ installed on my machine, the latest version I had was from 2013. Once I downloaded the most current version of Microsoft Visual C++, I was able to reinstall and everything seems to be functioning normally.

corymasterman on Sep 4, 2020