Error1 reports
Fix UnpackAndThrowOnError
in Selenium
✅ Solution
The "UnpackAndThrowOnError" error in Selenium often indicates a conflict accessing the Chrome user data directory, usually because another Chrome instance (or a previous Selenium session) is still using it. To resolve this, ensure all Chrome processes are closed before starting a new Selenium session. You can achieve this by either explicitly killing Chrome processes in your code before initializing the driver or using a unique user data directory for each Selenium session.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Jul 17, 2025
Last reported:Jul 17, 2025