Add BrowserStackLocal.exe (or the equivalent for your OS) to your .
Get the correct version for your OS from the BrowserStack documentation .
If your proxy requires authentication, you must specify the username and password within your test configuration or environment variables. 2. Manual Installation (Highly Recommended) fatal error trying to download browserstacklocal binary
Several environmental factors can trigger this download failure:
Are you seeing this error in a like Jenkins or GitHub Actions, or on your local machine ? Error in binary downloading request · Issue #5 - GitHub Add BrowserStackLocal
Temporarily deactivate the antivirus to confirm if it is the root cause. Summary of Quick Fixes Issue Type Whitelist *.browserstack.com on ports 80/443. Download Failed Manually download and place binary in .browserstack folder. Timeout
If you are behind a corporate firewall, you must ensure that your environment can reach BrowserStack's infrastructure. Summary of Quick Fixes Issue Type Whitelist *
The error typically occurs when the BrowserStack testing plugin or language bindings (Node.js, C#, Python, etc.) cannot automatically retrieve the necessary executable from BrowserStack's servers. This binary is critical as it creates a secure tunnel between your private network and the BrowserStack cloud for local testing. Common Causes
Timeouts can occur during the download or auto-upgrade process if the connection is slow or unstable.
Create a folder named .browserstack in your user home directory: macOS: /Users/$USER/.browserstack Linux: /home/$USER/.browserstack Windows: C:\Users\%USER%\.browserstack