Hello Sylvain,

  The --dev=reload flag in Odoo can sometimes cause issues on Windows due to file locking or monitoring inconsistencies.

  Here are a few steps to try and resolve this:

  First, ensure that your Odoo installation directory and custom modules are excluded from any real-time antivirus scanning. This can prevent file locking issues.

  Second, try using a different development tool like VS Code with the Odoo Debugger extension. This can provide better stability and debugging features on Windows.

  Third, verify that your Python installation is correctly configured and that all necessary dependencies are installed. Sometimes, missing or outdated dependencies can cause unexpected behavior with the --dev=reload flag.

  Finally, consider using a virtual machine with a Linux environment for development. This often provides a more stable and consistent experience for Odoo development, especially when using development flags.

For personalized assistance:
https://www.pragtech.co.in/contact-us-mql.html

I have the same issue did you find a fix for it?