### Summary The HTTPS endpoint of download.flutter.io appears to have an invalid configured SSL certificate. When ّ tries to download artifacts (for example flutter_embedding_debug POM files) from: https://download.flutter.io/io/flutter/flutter_embedding_debug/1.0.0-d2913632a4578ee4d0b8b1c4a69888c8a0672c4b/flutter_embedding_debug-1.0.0-d2913632a4578ee4d0b8b1c4a69888c8a0672c4b.pom However, accessing the same resource via HTTP works correctly: http://download.flutter.io/io/flutter/flutter_embedding_debug/1.0.0-d2913632a4578ee4d0b8b1c4a69888c8a0672c4b/flutter_embedding_debug-1.0.0-d2913632a4578ee4d0b8b1c4a69888c8a0672c4b.pom This suggests a problem with the SSL certificate configuration or certificate chain for the HTTPS endpoint.