The root cause is a mismatch between the URL your machine is trying to reach and the identity proven by the SSL certificate presented by the server.
export DART_VM_OPTIONS="--root-certs-file=/path/to/your/cert.pem" Use code with caution. The root cause is a mismatch between the
Note: The default password for the Java keystore is usually changeit . 3. Use an Alternative Flutter Mirror This usually happens in environments with corporate proxies
If the certificate issue is tied specifically to the primary download.flutter.io domain in your region, you can switch to a community or regional mirror. The root cause is a mismatch between the
The error typically occurs when Flutter's build tools or the Dart SDK attempt to fetch dependencies over a secure connection that is being intercepted or misdirected. This usually happens in environments with corporate proxies , restrictive firewalls, or when the underlying storage (Google APIs) serves a certificate that doesn't explicitly list the download.flutter.io domain. Why This Error Happens
: Visit https://download.flutter.io in a browser. Click the lock icon and export/save the certificate as a .cer or .pem file.