Software⏱️ 3 min read📅 2026-06-03

How to Fix: WebDriverException: unknown error: DevToolsActivePort file doesn't exist while trying to initiate Chrome Browser

Selenium WebDriver issue with Chrome browser

Quick Answer: Try updating the chromedriver version to match your Chrome browser version.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🔧 Proven Troubleshooting Steps
  3. 🎯 Final Words

The WebDriverException: unknown error: DevToolsActivePort file doesn't exist error occurs when trying to launch Google Chrome with a URL. This issue affects users who have recently updated their Chrome browser or are using an older version of the browser.

This frustrating error can be resolved by following the steps outlined below, which will help you identify and fix the root cause of the problem.

💡 Why You Are Getting This Error

  • The DevToolsActivePort file is a crucial component that enables communication between Chrome and its associated WebDriver. If this file does not exist or is corrupted, it can prevent the browser from launching correctly.
  • Another possible reason for this error is an issue with the chromedriver version, which may be outdated or incompatible with your system.

🔧 Proven Troubleshooting Steps

Updating Chrome Browser

  1. Step 1: Open Google Chrome and navigate to the settings page by typing chrome://settings/ in the address bar.
  2. Step 2: Click on 'Advanced' at the bottom of the settings page and then click on 'Reset and clean up computer'.
  3. Step 3: Follow the prompts to reset Chrome browser settings to their default values.

Updating chromedriver

  1. Step 1: Download the latest version of chromedriver from the official website.
  2. Step 2: Extract the downloaded zip file and locate the chromedriver executable.
  3. Step 3: Update the system environment variables to point to the new location of the chromedriver executable.

🎯 Final Words

By following these steps, you should be able to resolve the WebDriverException: unknown error: DevToolsActivePort file doesn't exist issue and launch Google Chrome with your desired URL. If you continue to experience problems, consider reinstalling Chrome browser or seeking further assistance from a qualified IT professional.

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